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Much may depend on the Senate’s tolerance for fuzzy math.

House Republicans passed a budget blueprint Thursday morning that lays the groundwork for the party to begin drafting legislation to enact President Trump’s agenda. Now the fight over the Inflation Reduction Act’s clean energy tax credits begins in earnest.
The blueprint is merely a set of instructions for writing the eventual budget bill, laying out topline numbers for tax cuts and spending reductions — it doesn’t contain any actual policies. Trump’s biggest priorities are to extend the tax cuts he enacted in 2017, pass new tax cuts on tips and overtime pay, and to boost spending on immigration control and defense.
The resolution that Republicans passed allows for all of the above. In total, it enables Congress to craft a bill that would increase the national debt over the next decade by more than $5 trillion.
The good news for the IRA tax credits is that the framework only requires lawmakers to craft legislation that would produce $4 billion in savings — a relatively small amount that doesn't exert much pressure on cutting the tax credits. The bad news is that Senate Republicans have given their word to budget hawks in the House that they will aim to cut much more than that — at least $1.5 trillion in spending. House Republicans, for their part, are eager to do at least $2 trillion in deficit reductions.
According to a “menu” of budget proposals that made its way around the Hill earlier this year, Republicans estimate they could save anywhere from $3 billion to $800 billion by repealing IRA tax credits, depending on how many and which ones are cut.
Lawmakers could also go after other climate-related policies, like cutting grant programs from the Department of Energy and Environmental Protection Agency. “Most of the funds have been obligated,” meaning they’re legally committed to grantees, “so there’s not much left to rescind,” Alex McDonough, a lobbyist with Pioneer Public Affairs, told me in an email. “We’ll see what they do with a possible rescission package, but even that would be a drop in the bucket compared to the trillions they want for offsetting tax cuts.”
Lobbyists on Capitol Hill and other experts I’ve spoken with over the past two weeks disagree about how much the numbers matter when it comes to whether and how much of the IRA will be repealed. Some felt the budget math would take priority, while others told me that if any of the tax credits were killed or saved, it would be for political reasons over anything else.
Though the biggest political target seems to be the electric vehicle tax credits, “anything with a price tag is at least somewhat vulnerable,” McDonough said. Lawmakers could also opt to make certain credits more difficult to access or phase them out earlier rather than fully repeal them.
McDonough also said the lobbying that companies and trade groups have been doing around the manufacturing and clean electricity tax credits appeared to be working, and will ratchet up even more in May. “Appealing to ‘all of the above’ and ‘energy dominance’ is working because everyone knows how badly we need new generation to meet rapidly rising demand and a lot of the clean energy resources happen to be the quickest to deploy,” he said. “Utilities want it too, which is also very important.”
On Thursday, Republican Senators Lisa Murkowski of Alaska and John Curtis of Utah sent a letter to their party’s leadership asking them to preserve tax credits that spur manufacturing, reduce energy costs for consumers, and give certainty to businesses that have already made investments in the U.S. based on the credits. Thom Tillis of North Carolina and Jerry Moran of Kansas also signed the letter. It was the first major show of support for the tax credits in the Senate, following a similar letter signed by 21 Republicans in the House.
Republicans are trying to enact Trump’s agenda using a special process called budget reconciliation, which will enable them to pass it with a simple 51-vote majority rather than the 60 votes required to overcome a filibuster. The party currently has 53 seats, so four Republicans coming out in favor of preserving IRA tax credits is a good sign for the law. Similarly, the Republicans have a seven-seat majority in the House, and so those 21 who like the IRA could have quite a bit of influence.
But the other big open question for the future of the IRA — and frankly, for the future of the Senate — is whether Republicans will proceed with the fuzzy math they are using to calculate the cost of the bill. When the Congressional Budget Office scores the extension of Trump's 2017 tax cuts, it will use what's called a "current law baseline," and estimate that they will cost the government more than $3 trillion dollars over the next ten years. Senate Republicans, however, have asserted that extending the 2017 tax cuts is free and will have no impact on the deficit, using a different scoring method called a “current policy baseline.”
The reason this matters for the IRA is that the budget reconciliation process has strict rules. If lawmakers were forced to recognize the true cost of the tax cut extensions in drafting the budget bill, they would have to make several trillion dollars’ worth of additional spending cuts in order to align with the blueprint they passed this week. In that scenario, it’s hard to see how any of the IRA could survive.
But if Republicans unify around this fuzzy math and carry it all the way to the final vote on the bill, which would be unprecedented, they could face a showdown with Democrats, who will say the bill doesn’t comply with the reconciliation rules. In that scenario, they’ll be faced with a choice either to go back to the drawing board or take the nuclear option — essentially changing how the Senate operates.
“There will be a majority vote on whether the Senate wants to change its precedents going forward, forever, and basically open up reconciliation to whatever policies the majority wants to enact going forward,” Charlie Ellsworth, another lobbyist for Pioneer Public Affairs, told me.
Expect to hear a lot more about this debate over the cost of the tax cuts once lawmakers return to Washington on April 28 after a two-week recess. Republicans have said they want to get the budget bill to Trump’s desk by Memorial Day. McDonough doesn’t think that’s in the cards, and expects it to happen by the August recess at best. But he expects the House Ways and Means committee to push out a first version of the bill in May, so we’ll see what the first proposal is for the fate of the IRA tax credits then.
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We didn’t know days like this could happen. Then we learned how bad they really are.
When I woke up this morning in Chicago, the Air Quality Index was in the 300s, and I could barely see the top of the skyscraper across the street. The weather app on my phone featured a little image of a man wearing a World War I-style full-face gas mask. That’s fun, I thought. I didn’t know it could do that.
I went downstairs. Old photographs of the city were hanging in the hotel lobby — girls playing in bathing suits next to the lake — and I realized that the haze shrouding the old Lakeshore Drive condos was in fact haze, smoke, particulate matter, and not a lens artifact. It really used to be that smoky all the time, back before the Clean Air Act. Then I glanced up and saw that the haze out the window was far worse than the century-old pollution in the picture.
It’s significant, I think, that a mass smoke-out like this has now happened to the eastern U.S. for a second time. Second times matter. When exhaust from Canadian wildfires blanketed the Northeast and parts of the Midwest in June 2023, exposing more Americans to wildfire smoke than on any previous day in history, one could almost write it off as a freak occurrence. It was upsetting, sure, and reminiscent of California’s climate-addled amber skies. But didn’t wildfire smoke also descend on New England once in the 1780s? Even on a warmer planet, couldn’t this remain a once-in-a-century blip?
Twice in just over three years, though — that‘s more than a hiccup. That’s almost a trend. To get smoked out once may be regarded as a misfortune; for it to recur again, without any plan to respond, starts to look like carelessness. The federal government is doing roughly diddly squat about adaptation — President Trump can build a fan on the border and make Canada pay for it — but state and local governments across the eastern U.S. will now need to reckon with a new form of extreme weather. You grew up with snow days, but now we’ll have smoke days — and schools and sports leagues and concert venues will need rules about how to deal with them. When should games be canceled, tickets refunded? Is smoke more like a heat wave or a hurricane? Hotels and office buildings will need to review their ventilation policies and possibly upgrade their equipment; municipal emergency response plans will be revised and printed in triplicate.
All this will happen because the smoke has invaded a second time — and arguably a third, if you count last year’s minor episode — and that means it could come back again. For that reason, this event strikes me as a much bigger deal than what happened in 2023. The smoke is now a fact of life; institutions will need a policy about it. The tortious creep of litigation risk will enforce that outcome, even if no federal official enforces it.
So it goes. But to be clear, this new inconvenience is not what worries me most about today’s events. No, what frightens me instead is that today’s airborne toxic event is not something that was supposed to happen. Until a few years ago, we had not thought too hard about whether a major smoke exposure event like this could happen on the East Coast at all. It had not seemed possible.
For years, economists and climate scientists have simulated how global warming might affect the U.S. and global economies. They poured years of careful work into this modeling, and they simulated — with ever-increasing levels of statistical persnicketiness — what extreme heat and sea-level rise might do to agricultural yield, labor productivity, energy demand, heat mortality, and real estate values, among other potential sources of damage. This work was useful; it improved our practical understanding of coastal flooding, to name one example. It also helped calibrate U.S. regulatory policy, even if it never achieved the crowning heights of helping to set a national carbon tax.
Yet these careful models almost never accounted for mass smoke exposure days. Indeed, the kind of thing that happened this week — when heavy haze blows down from Canada and exposes more than 100 million people to hazardous air — was not countenanced by the simulations at all. Only in recent years did economists begin to study events like these, and only because mass exposure events like 2023’s happened first.
We’ve long known that the tiny shreds of particulate matter in wildfire smoke dance across the body’s barriers and penetrate its deep places, etching their way into lung, heart, and brain tissue. Inflammation follows. What makes days like today unique is the scale: Tens of millions of Americans inhaling wildfire smoke at the same time. As we’ve started studying this phenomenon, it’s become clear that the mortality effects of days like today, the deaths elevated above what you’d otherwise expect, can persist for years. That becomes extraordinarily expensive for society.
How costly? “When monetized,” a group of Stanford and Princeton economists wrote in Nature last year, in the first major study on the topic, “the climate-driven smoke deaths result in economic damages that exceed existing estimates of climate-driven damages from all other causes combined in the U.S.A.”
You read that right: The cost of climate-worsened wildfire smoke alone is larger than what earlier studies said every other estimated cost of climate change would be, combined.
To summarize, wildfire smoke did not appear in our economic simulations of climate change. As recently as a few years ago, we did not really know that days like today — or June 7, 2023; or September 15, 2020; or September 9, 2020 — could occur. Then they happened. And happened again. And then we studied them and discovered that, in fact, they may be more expensive for the U.S. economy than we once thought climate change itself would be.
That worries me. Now we know these smoke-out days can happen; now they are fast becoming a rare but predictable feature of summer life. But until recently they were unimaginable. What other ignominies, what other tail risks and airborne surprises, are lurking in the uncontrolled experiment we’re running on the biosphere? What else — unforecast, unmodeled, unstudied, unthought of — lies ahead? After 10 years of covering the climate system, I am not someone who lies sleepless fretting about atmospheric CO2. But I do wonder what else we don’t know enough about to ask.
“Microsoft, you can’t hide, we can see your dirty side!”
Protestors interrupted one of the final sessions of PNW Climate Week — a conference that brings together climate leaders across Washington, Oregon, and British Columbia — objecting to Microsoft’s rising carbon emissions from data centers and partnerships with oil and gas companies. The company’s Chief Sustainability Officer Melanie Nakagawa was having a one on one conversation with GeekWire climate reporter Lisa Stiffler at Seattle’s City Hall when protestors carrying signs reading “Microsoft’s AI pollutes” and other slogans began shouting from the audience.
I was there, having just moderated the prior panel on how to finance Washington’s clean energy ambitions. Early on there were some rumblings in the crowd from up front. “Climate leaders don’t build gas pipelines in Moses Lake,” was the first objection I heard clearly. It came shortly after Nakagawa kicked off the conversation by highlighting Microsoft’s partnership with sustainable aviation fuel startup Twelve, which recently opened its first commercial-scale SAF plant in Moses Lake, Washington. The tech giant has supported the project through a strategic investment from its Climate Innovation Fund, as well as an offtake agreement for the fuel that will help offset its emissions from employee travel.
Whether Microsoft is building a gas pipeline in this particular community I haven’t been able to determine, though it seems irrelevant to Twelve’s SAF facility, which doesn’t rely on natural gas. But it is true that Microsoft is one of the largest power consumers in Grant County, Washington, home to Moses Lake, where a natural gas pipeline operator is looking to expand its network to accommodate data center load growth.
Another audience interruption was more pointed. “How does signing a 20-year deal with Chevron help you reach your clean energy goals?,” one protestor asked, referring to Microsoft's recently announced power purchase agreement with Chevron for nearly 2.7 gigawatts of natural gas-fired power to supply a West Texas data center. The project represents one of the largest gas-powered artificial intelligence developments in the U.S., and Stiffler acknowledged that she had been planning to ask about it, herself.
Nakagawa answered the question. at least in part, saying “that project with Chevron is initially using natural gas and it’s a natural gas contract,” before emphasizing that the company has built “over 4.5 gigawatts of clean energy already today,” and remains committed to balancing speed-to-power with its clean energy goals. She added that, “with this deal in particular, we’re looking at a range of tools in our toolbox to ensure that we can continue to grow our power, but also do so in a way that is responsible and sustainable.” She stopped short, however, of making any commitments to transitioning the project to renewable energy over time.
The session became more chaotic from there. Another protestor stood up, shouting that “Microsoft is enabling genocide in Palestine.” Other activists joined in, while still other audience members shouted back. As Nakagawa recovered and resumed answering a question from Stiffler about Microsoft’s recent decision to pause its carbon removal purchases after years of dominating the nascent industry, protestors throughout the crowd began a chant of “Microsoft, you can’t hide, we can see your dirty side.” Security eventually shepherded many of them out.
Stiffler continued speaking with Nakawaga about the company’s clean energy efforts, touching on many of the protestors’ concerns as she asked about community opposition to data centers, the role of large corporations in the clean energy transition, and whether Microsoft can realistically achieve its goal of becoming carbon negative by 2030.
Nakawaga emphasized that the company must, “first and foremost, listen to where the communities are and what they are calling for.” Regarding the concerns she hears most often, she explained that “first has been transparency. Second has been around resource uses and what are we doing about those resource uses. We’re hearing about jobs and employment and investments in education, investments in housing.”
If this session was any indication, those concerns won’t go away anytime soon.
Heat kills more Americans than any other extreme weather event in the United States. But wildfire smoke — while not strictly “weather” — appears to kill even more. Current excess death estimates put American heat mortality at about 10,000 people per year, or possibly as high as 12,000. Recent studies on wildfire PM 2.5 exposure suggest a mortality of double that: 24,000 all-cause deaths every year.
Needless to say, wildfire smoke is definitely not something you want to inhale if you can avoid it. (And really, you should try to.) But for the 115 million Americans in the Great Lakes and Northeast regions of the country who’ve been exposed to hazardous air from the fires in Ontario and Minnesota this week, there’s a chance that the damage is already done. According to a wildfire smoke mortality estimation tool from Cornell University’s School of Public Health and the Northeast Regional Climate Center, the total mortality for this smoke event could already be as high as 424 people so far, including nearly 100 in Michigan and more than 50 in both New York and Wisconsin.
Alistair Hayden, an assistant professor of practice in Cornell’s Department of Public and Ecosystem Health, stressed to me that the tool is a “first draft,” and that his team is still working on getting it peer-reviewed. “We intend it as a hypothesis that people can test in the coming weeks or months to confirm our numbers,” Hayden told me. “I’m really hoping to be proven wrong.”
But Hayden also emphasized that while the West Coast might historically be where many smoke-related deaths have occurred, “this is the third out of four years [in the Northeast] that we’re having the smoke, so it seems like something we should be planning for,” he said. “It reminds me of that saying: ‘Fool me once, shame on you. Fool me twice, shame on me.’”
Admittedly, the smoke this week is a bit of a freak occurrence. A cooler-than-average sea surface pattern across the North Pacific, known as a negative phase of the Pacific Decadal Oscillation, helped produce weak low-pressure areas in the northwestern part of the United States, which in turn allowed for heat domes to develop across the Southwest and Plains. After one did just that earlier this month, the hot, high-pressure dome then shifted north, where it developed “dryness across Canada, followed by the lightning-producing thunderstorms,” Chad Merrill, a senior meteorologist at AccuWeather, told me. Then, boom: widespread fires.
“It is very unusual to have a combination of an El Niño and a negative phase of the Pacific Decadal Oscillation,” Merrill went on. “That’s one of the unusual factors this year, which contributed to the heat dome being farther north in that particular position.” The heat dome and jet stream then worked together to direct the thick smoke down into some of the most populous regions of Canada and the U.S.
That’s what makes this particular smoke event so bad. Were the smoke blowing over remote regions of Canada, as it would under more usual conditions, “then the big cities and the Great Lakes wouldn’t experience the smoke; it would have gone north toward the Hudson Bay and then Greenland,” Merrill said. In fact, the Canadian fire season is tracking below average overall; it’s the meteorological conditions that made this week’s smoke events, as one outlet put it, “the perfect storm.”
Wildfire smoke in the region is not historically anomalous, however. A 1903 article in The New York Times describes a “yellow day” similar to smoky events in 1894, 1881, and earlier. But large-scale burns in Canada’s dense, remote boreal, which produce more smoke, are increasing. Though it’s difficult to attribute any one wildfire directly to climate change because of the complex nature of such events, we do know that fire weather is becoming more common with the warming of the atmosphere from greenhouse gas emissions. As modeled by Zeke Hausfather in the Friday edition of his newsletter The Climate Brink, “hotter, drier seasons burn the most” in Canada — and “recent years cluster there” as the country has outpaced the global average in warming.
But as Hausfather also writes, “While overall area burned is the climate-linked trend, who breathes the smoke on a given week in July is mostly driven by the weather.” This is similar to the way that, though it may be a quiet year in the Atlantic, it only takes one hurricane making landfall in the right (or wrong) spot for the season to be remembered as catastrophic.
On the other hand, as foolish as it might be for the Central Plains and East Coast to still believe smoke is the exclusive domain of Westerners, it is also a mistake to assume smoke only comes from without. As I reported earlier this year, the Eastern half of the country has seen a 10-fold jump in the frequency of large burns over the last 40 years. Nowhere is safe from the smoke.
Planning and preparation, then, should be paramount. But as Grist learned last month, there are no established Air Quality Index numbers that would trigger the postponement, relocation, or cancellation of, say, a FIFA World Cup game, including the final, which is set to be played in New Jersey on Sunday. White House officials are reportedly meeting with FIFA’s president on Friday to discuss contingencies, given the unhealthy air quality in the region.
Which brings us back to Hayden’s modeling. He offered a note of optimism in that research by Stanford’s Sam Heft-Neal and his colleagues indicates that emergency room visits do not rise in tandem with increasing wildfire smoke. “As smoke gets bad, the health impacts get bigger. But then as smoke gets worse and worse, the amount of health impacts actually goes down, measured for emergency room visits,” Hayden said. “The idea is that people modify their behavior in higher smoke” — say, by staying indoors, wearing masks, or canceling outdoor events.
It’s time to treat smoke as an East Coast phenomenon, in other words. Doing so will save lives. “Will [smoke events] become more frequent in the future? Most likely we will see a recurrence,” Merrill, the meteorologist, told me. “How often they happen is yet to be determined.”