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From the national to the state to the local level, the state is about to hold some of the country’s most crucial elections.

In 2022, the Arizona Republic published a sentence many Democrats had dreamed of reading for decades: “Arizona,” the paper announced, “is a blue state.”
At the time, it felt true. In 2020, Joe Biden won the Grand Canyon State — only the second time a Democrat had done so since Arizona broke for Harry Truman in 1952 — and Democrat Mark Kelly defeated Republican Sen. Martha McSally in a special election to fill the late John McCain’s Senate seat, a victory that helped the Inflation Reduction Act get over the finish line. The 2022 midterm elections confirmed that the Democrats’ wins in the state hadn’t just been a one-time occurrence: Kelly successfully defended his seat, securing a full term; Katie Hobbs won the governorship; and Adrian Fontes beat a January 6 participant to become the secretary of state, Democrats all.
With the 2024 election still a little more than a week away, it’s too soon to tell whether the blue state proclamations of 2022 were premature. But Arizona hasn’t been looking terribly cerulean. In 2023, the Republican-held state legislature passed eight of 16 anti-environment bills introduced and stranded 22 pro-environment bills without committee hearings. Republican voter registration in the state has also swelled since 2016 as Democratic rolls stayed relatively stagnant, giving the GOP an edge in a place where 10,457 votes can make all the difference.
Arizona is just one state out of 50 (or 11 electoral votes out of 538, if you prefer), but it represents a curious microcosm of the high-stakes climate and energy elections happening all over the country this November. Or perhaps it is not so curious: Arizona is on the front lines of the climate-related impacts of droughts, longer and nastier heat waves, ozone pollution, and wildfires, while also being in a position to weigh the trade-offs of crucial clean energy developments like building new energy transmission, critical mineral mining, and utility-scale solar. “It’s like an incubator. There’s just so much happening here, it’s ready to burst,” Jane Conlin, a co-leader of the Tucson chapter of the Citizens' Climate Lobby, which has been engaging in get-out-the-vote efforts with the Environmental Voter Project, told me.
Aside from its electoral college allocations, the most consequential race in Arizona this cycle will be for outgoing Independent Senator Kyrsten Sinema’s seat. The state is currently leaning slightly toward Democratic Representative Ruben Gallego, who could help stem a total hemorrhaging of blue seats from the Senate — which, in turn, would have implications for the passage of any decarbonization legislation in the next administration.
Two U.S. House elections in Arizona could similarly help determine the balance of power on Capitol Hill come January. AZ-01 is the wealthiest congressional district in the state, in the northeastern corner of Phoenix’s Maricopa County, where a former E.R. doctor is trying to unseat a seven-term Republican incumbent in a battle that has centered on abortion access. (The district is also home to the Rio Verde Foothills, which made national headlines in 2022 when Scottsdale cut off its water supply due to drought-related shortages.)
But it’s the other race, in the sixth congressional district spanning the suburbs of Tucson, that looks more like a proxy battle between different climate ideologies. Kirsten Engel — who previously worked for the U.S. Environmental Protection Agency and serves as the co-director of the Environmental Law Program at the University of Arizona — is challenging Juan Ciscomani, a Trump-endorsed moderate conservative who has backed residential solar projects, promoted himself as an advocate for a “secure water future,”and, earlier this year, co-sponsored a bill seen as a first step toward a carbon border tax. (As his opponents quickly point out, he also voted against the IRA; Ciscomani has also been tied to a groundwater scandal involving a Saudi Arabian-owned alfalfa farm.)
Engel previously lost a tight election against Ciscomani in 2022, and has made abortion a centerpiece of her campaign, too. But she has also gone aggressively after the Republican for his alignment with the mining industry, including his support for a proposed open-pit copper mine that opponents say will pollute Tucson’s air and waterways; supporters, meanwhile, say it’s critical to create a domestic supply chain for the energy transition. The League of Conservation Voters, which identified the sixth congressional district election as one of its priority races, is running ads in the state playing up this pollution angle.
Engel herself has slammed the proposed mine, which would be built on public lands, as a “giveaway” to a foreign mining company, and touted the need to protect the region’s “spectacular scenic vistas and the tourism economy.” She has also sought to go toe-to-toe with Ciscomani on water conservation, though as Grist has reported, drought and water rights can be tricky for Arizona politicians to run on because voters don’t have a firm grasp of how the complicated policies work.
The future of climate policy at the regional and municipal levels in Arizona is also in play. Democrats could potentially flip the balance of power in the state House and Senate, each branch currently having just a one-seat Republican advantage, and restart movement on the slate of stalled pro-environmental bills. (The Democratic governor’s term runs through 2026.) “The state legislature in Arizona is so critical,” John Qua, the campaign manager of Lead Locally, told me. “Not only does building a democratic trifecta get the state closer to passing policy that tackles climate change in some of the ways we might more typically understand it — like moving towards clean energy — but it also makes it much likelier that the state legislature will pass water conservation policy.”
The 11 races are “all at a razor-thin margin,” Qua told me, though climate is unlikely to be the issue that tips the balance in any of them. That goes for just about any race in Arizona — except the state’s Corporation Commission, which Heatmap’s Emily Pontecorvo covered earlier this week. Currently, the ACC is operating with a four-to-one Republican majority, but with three Democrats, two Green party candidates, and three Republicans (including an incumbent) running to fill three seats, there’s a wide-open chance that candidates sympathetic to clean energy policy, including the state’s massive solar opportunity, could take control.
“Arizona could lead the world in solar power if politicians would only let it,” Nathaniel Stinnett, the founder and executive director of the Environmental Voter Project, told me. “But that isn’t going to happen unless the climate movement starts showing up in unstoppable numbers whenever there’s an election.”
Conlin, who co-leads the Tucson chapter of the Citizens’ Climate Lobby, has been working on the ground to reach the 230,000 potential first-time environmental voters that Stinnett and his team have identified in the state. (EVP numbers released earlier this week showed that those who vote based on climate issues were about 20% more likely to have submitted an early vote than the average voter.) During a recent folklife festival CCL volunteers attended, “I think about only 25% of people [we engaged with] were really aware of the Arizona Corporation Commission,” Conlin told me. But she’s excited nevertheless: This year, the ACC poll is on the front of Arizonans’ ballots, rather than the back, making it harder for even low-information voters to overlook.
The state is also a case study of how an elected body as small and seemingly insignificant as a school board can make a difference in the progress toward decarbonization. The Tucson Unified School District board of governors will vote next week on a climate action plan that would set a goal of reaching net-zero emissions by 2045. If successful, TUSD would be one of the first school districts in the nation to have implemented such a plan.
Arizona is not the only state in the country that, as Colin put it, feels “on this cusp of being able to reach out — not only to see a 50% cut in emissions but 100%. It’s doable, it’s within reach.” Pennsylvania and Michigan voters will also have opportunities to elect politicians who will advance climate legislation, and voters in Washington, California, and New York can defend their states’ progress. But it’s Arizona where the stakes seem especially immediate — and high. “It’s supposed to be 96 [degrees Fahrenheit] here today,” Conlin marveled when we spoke this week, at the end of October.
I could hear the weariness in the voices of the organizers I spoke to after a long, hard-fought season; candidates are set to make their final pitches to voters next week. Early-voting ballots are already in the mail or in hand. The CCL has just one final day of canvassing planned, on November 2. The polls will close three days later, at 7 p.m. local time, and then the count will begin.
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SoftBank’s error and Nvidia’s scandal suggest data centers may have already peaked as an economic and energy trend.
This is Heatmap Daily, a weekday digest written by our executive editor. Subscribe here.
Covering energy and climate change sometimes means seeing certain stories in a different light than others. And a particularly vivid hue illuminated The Wall Street Journal’s report today that the Japanese conglomerate SoftBank Group is taking a $3.7 billion loss on several gigawatts’ worth of natural gas turbines.
For the Journal, the big news is that SoftBank and its billionaire founder, Masayoshi Son, are failing to capitalize on the artificial intelligence boom. But at Heatmap, we’re thinking about the turbines.
The data center boom and the return of electricity load growth has depleted the world’s supply of natural gas turbines. SoftBank had purchased reservations for about 13 gigawatts of turbines, according to the Journal. That’s a staggering amount of electricity — it could meet New York City’s maximum power draw on the hottest part of a summer’s day. The conglomerate now seems set to dump reservations for about four gigawatts’ worth. Keeping a reservation, it turns out, really is harder than making it.
Most of those rotors were reportedly from GE Vernova, one of the world’s largest producers of gas turbines. GE Vernova’s order list for gas turbines has been filled for nearly two years and the waiting list now stretches into 2031. That has led data center developers, hungry to get power as soon as possible, to reach for ever dirtier forms of electricity generation, including diesel generators and even old jet engines.
On that front, SoftBank’s failure to sell the turbines to a higher bidder suggests (albeit weakly) that demand for energy-producing assets might not be as strong as the AI boom’s backers once thought. SoftBank was already set to send about 9 gigawatts of turbines to the enormous Trump-backed OpenAI data center in Pike County, Ohio. The roughly remaining four gigawatts will be released back their manufacturers. (One thing this news can’t quite tell us, alas, is what type of turbine set-up will be used in the Pike County facility, which will be the world’s largest gas-fired power plant if it is build to completion. Recent public filings have suggested the facility isn’t planning on using any turbines in the more efficient combined-cycle configuration, which would mean the plant’s carbon intensity will be worse than most other new natural gas plants. But we’d love to hear any tips on this front.)
To zoom out for a second, I’m struck by how the AI bubble has been replaced by an AI muddle. As I wrote this, news emerged that Nvidia is preparing to fire its CEO, Jensen Huang, for his affair with a Chinese woman who is alleged to be a spy. (He had at least one more affair with another Nvidia executive, according to The New York Times.) Under Huang’s leadership, Nvidia has invested in a sprawling and sometimes circular network of energy-related companies, including Emerald AI, a startup that helps data centers flex their electricity consumption, and Redwood Materials, a battery recycler and producer led by the former Tesla executive J.B. Straubel. Huang has used Nvidia’s enormous balance sheet to buy down the risk of other AI and AI-related companies, propelling the overall AI trade to become the biggest story in American markets.
Now that balance sheet is in peril: Nvidia’s stock is already down 11% over the past five days, and it has fallen another 8% in after-hours trading since news broke of Huang’s ouster. If the chip designer’s financial network began to fray — or even if the next CEO had a lower risk appetite than Huang — then its demise could impact a much larger set of firms.
Even before the Huang scandal broke, companies at the center of the AI trade were showing signs of weakness. Alphabet, Meta, and Microsoft are all down on the month. Nvidia was already lagging by about 10% on the month before its hebdomas horribilis began, too. The memory and chip makers Micron and Applied Materials are both down more than 25% in about the same period, and GE Vernova and Oklo have fallen nearly 20%. Although the data center company Coreweave rebounded on an earnings beat today, it’s still down 24% on the month and nearly 50% since May.
The market rout isn’t total — Anthropic seems likely to enjoy one of the largest IPOs ever in the next week (although perhaps not with quite as large a valuation as its investors once imagined). And the underlying technology of AI seems to be getting worryingly better all the time. But even though the politics of data centers and AI seem set to dominate the new Washington, I’m wondering if data centers as a mainstream economic trend might have already peaked. Americans voted for a more subdued AI boom in the midterms. Now it seems like they might get it ahead of schedule.
Lunar Energy’s latest AI-powered system aims to integrate EVs into the automated demand response mix.
In theory, it’s straightforward to assemble the smart energy home: Solar panels, home backup batteries, and electric vehicles, plus smart thermostats, heat pumps, and water heaters — all the individual pieces can be had for the homeowner who can afford the up-front cost. The challenge is getting all those pieces to talk to one another.
Bay Area-based Lunar Energy is one of the tech firms that’s been trying to crack this problem. Today, it announced an upgraded version of its artificial intelligence-powered home energy control system, which not only integrates all those separate systems but also responds tactically to energy markets. CEO Kunal Girotra told me Lunar AI saves its users money by monitoring their home 24/7 and making decisions to charge, not to charge, or discharge so that they save the most money.
“Utilities are all moving to almost-real-time changes of rates,” he said. “You need software to handle that for you. I think that the race is on for who has the best AI machine learning algorithms to save the most amount of money. And so far, we seem to have a head start.”
Lunar’s first-generation system focused on generation, storage, and control. In other words, it connected elements like a home’s rooftop solar panels with the backup battery the residents might keep in the garage, using the AI to decide when to meet the home’s real-time energy needs with solar versus grid energy versus stored power. What it didn’t have was the ability to work with electric vehicles to manage charging and use the car’s battery as a bonus source of energy.
To fix this, Lunar has built its own bidirectional EV charger — one that can charge up the battery or discharge the car’s battery for a secondary use, like backing up the home’s power supply. Girotra, formerly the head of Tesla Energy, told me the problem with that functionality to this point has been the connection point between the car and the home electrical system. Carmakers and other companies in the space didn’t have the deep experience with electrical certifications to make the process seamless, he tells me. That led to setups like the original Ford Charge Station Pro, which required several different wall-mounted electrical boxes to connect the F-150 Lightning EV to the home.
Lunar’s charger is built to connect to its customers’ existing home Lunar energy system, which includes a microgrid interconnect device they call Lunar Bridge that islands the home in case of a power outage on the grid. In that way, the power stored in the EV battery is ready to back up the home in case of a blackout without any additional work — or to be optimized as part of a fully smart home that’s making money as part of a virtual power plant.
The company’s setup allows for another fun feature: “slow” charging that’s not slow at all, but actually two or three times as fast as the Level 2 charging most EV owners use to recharge their batteries overnight. Electric cars in the U.S. can typically take on only about 11 kilowatts of AC power from one’s home because of the limitations of their on-board hardware. Because Lunar’s system is fully DC, however, Girotra said the company decided to build a DC home charger, one that — like a Tesla Supercharger or other DC fast chargers out in the world — isn’t limited by that power cap. Lunar said it could use a combination of power from the grid, home solar, or home batteries to charge an EV at up to 25 kilowatts. That’s enough to recharge an EV in three to four hours rather than six to eight.
“If the standards get high, and if everybody sees cars can get charged in three hours, then all of a sudden people are like, ‘Wow, this is how I want it,’” he said. “Especially for 25% of the users who are like me, who always are running low on charge and they don’t mind a boost every now and then.”
Some of the other improvements in the second-gen system are more incremental. An inverter that’s 40% more powerful helps Lunar get its system up to enterprise scale. That’s crucial, as the world moves toward a place where more homes and businesses employ battery backup systems. Lunar’s new batteries come in modular 5 kilowatt-hour blocks ranging from 10 kilowatt-hours to 30 kilowatt-hours in a single unit and scale up to 300 kilowatt-hours for home or small commercial use; there’s also new pad-mounted configurations with capacity up to 1 megawatt-hour.
Batteries, though, are the simple part. Everyone from EV makers like Rivian to utilities like Octopus Energy is racing to make a person’s or a business’s batteries and solar panels and electric cars work for them, using the power of AI to account for moment-to-moment changes in energy prices and supply. Lunar’s new tech makes the case that the most important element is a single brain to integrate every last smart, electrified thing in your house.
The fundraise comes on the heels of a $50 million grant from the Department of Energy.
Almost all lithium-ion batteries on the market rely on graphite for their anodes, more than 90% of which is processed in China. That concentration has created a chokepoint in the Pentagon’s supply chain as the military increasingly turns to batteries to help its transportation network operate more quietly and reduce reliance on complex refueling logistics.
So when Congress passed the latest National Defense Authorization Act at the end of 2025, barring Chinese-linked battery materials from military use starting in 2028, Coreshell saw an opening. While the California-based silicon-anode battery startup had previously focused on automakers as its beachhead customers, it’s now shipping its first battery cells to the military for use on Navy ships and Army ground vehicles. On Wednesday, Coreshell announced a $30 million Series B to scale up manufacturing operations to meet the needs of this growing customer base.
“We’re entering a new stage where we’re no longer, I would say, demand limited,” Coreshell’s CEO Jonathan Tan told me. “This year we’ve had to put on second and third shifts, work nights and weekends, just to get the product out the door.”
Coreshell sets itself apart by going a step further than the NDAA requires. The law doesn’t make suppliers trace battery materials all the way back to the mine, which would be exceedingly difficult given China’s dominance across the battery supply chain. But Coreshell has nevertheless eliminated Chinese sourcing from its anodes by replacing graphite with silicon mined and refined in the U.S. by Ferroglobe, one of its Series A investors.
Ferroglobe and global investment firm Access Industries led the latest round, with defense contractor ADS also joining as a new strategic investor. The financing comes on the heels of a $50 million Department of Energy grant that Coreshell secured in August as part of a program to strengthen the domestic battery supply chain. That funding will support the company’s first commercial-scale facility, a 2-gigawatt-hour factory.
That’s about 20 times the size of the 100-ish-megawatt-hour plant the startup had originally envisioned, as the DOE grant has allowed Coreshell to “expand much further than we were originally expecting,” according to Tan. The company is now evaluating several potential U.S. sites and expects to announce its selection early next year. For now, it relies on unnamed contract manufactures, along with its small pilot line in San Leandro, to produce its cells. But once the gigafactory gets up and running, the startup plans to bring electrode production in house by 2028, followed by full cell assembly in 2029.
Building this plant will ultimately require significant additional capital. But Tan believes this latest vote of confidence from the federal government will help Coreshell to diversify its capital stack as it continues to fundraise. “That’s one of the great things about having such a notable DOE award is that it also allows us to attract multiple forms of capital,” he told me.
Silicon has long been recognized as a promising alternative material for battery anodes, as it can store far more energy than graphite. The catch is that it tends to swell during charging, causing it to break down quickly and ultimately leading to a much shorter cycle life. Coreshell says it’s extended its anode’s lifespan by giving it a proprietary coating, which Tan told me back in April essentially means “painting the inside of your battery” with an ultra-thin protective layer.
Other companies, such as Sila Nanotechnologies and Group14 Technologies, are also working to commercialize silicon anodes. But Coreshell says many of its competitors rely on more highly engineered, expensive forms of silicon, such as silane gas. By contrast, Coreshell uses metallurgical silicon, a cheap, raw commodity already widely used in aluminum alloys. That, Tan argues, gives the company a cost advantage not only over its competitors, but potentially Chinese graphite too.
Coreshell hasn’t yet demonstrated that its cells can meet the performance demands of the automotive industry, however. When the company raised its Series A in early 2025, it said it expected its automotive cells to exceed 1,000 charge cycles while retaining 80% of their original capacity. But Tan told me many defense applications don’t require such demanding performance targets, as Navy ships and ground vehicles are “not intending to have as many miles or missions or use cases on that same battery” as a consumer EV would.
That doesn’t mean the company is abandoning its automotive ambitions. As Tan pointed out, electric vehicles remain by far the largest source of global and domestic battery demand. “It’s natural for us to obviously utilize the security supply chain first,” he told me. “That allowed us to really get to commercialization, revenue, and production faster, because automotive qualification is this longer journey. But ultimately, we want to do both of those and more.”