Who Broke the USA's Budget? A Fiscal Scorecard, 2000–2026

In January 2001, the Congressional Budget Office projected $5.6 trillion of surpluses for the decade ahead. Twenty-five years later, federal debt held by the public has tripled, to about 100% of GDP. The government just ran a $2.0 trillion deficit, 6.2% of GDP, in a year without a recession, and interest on the debt now costs more than the military.

The usual explanation is that both parties did this together. It is a comfortable story, and it is wrong where it matters. Count who sat in the White House and the two parties look roughly even. Count the laws they chose to pass, and the record is lopsided: the largest deliberate, unpaid, non-emergency additions to the debt since 2000 were written, passed and signed by Republicans.

The short version

• Three unpaid tax cuts did the most damage. The three are the Bush cuts of 2001–03, Trump's 2017 cut and Trump's 2025 law. With the unfunded Medicare drug benefit, they added about $6.9 trillion of borrowing over ten years, as estimated when they passed. That equals 38% of a year's GDP at the time. All passed mainly on Republican votes. Each time, growth failed to pay the bill.
• Two rare, catastrophic failures came on Republican watches. The 2008 collapse happened under Bush's regulators. The COVID response faltered under Trump. Through the 2008 crisis (2007–10), debt rose from 35% of GDP to 61%. Through COVID, it rose from 78% to 98% in 2020 alone. That is about 46 points of GDP across the two crises.
• Republican presidents started three unfunded wars. Bush launched Afghanistan in 2001 and Iraq in 2003 while cutting taxes. They were the first major American wars fought alongside tax cuts rather than tax increases. Congress spent about $1.6 trillion on them through 2014, roughly 11% of a year's GDP, and none of it was paid for. With veterans' care and interest, the bill runs near $8 trillion. Trump launched the third, against Iran, in 2026 without authorization from Congress. It has cost about $38 billion so far and is rising by about $3 billion a month.
• Republicans spent recklessly in good times. They cut taxes at very-low unemployment in 2017 and with deficits near 6% of GDP in 2025, so every crisis hit a more indebted country.
• Democrats' signature laws were paid for. Outside emergencies, laws passed mainly on Democratic votes were scored as slightly cutting deficits. Obamacare and Biden's Inflation Reduction Act both reduced deficits on paper.
• Democrats are not blameless. They made most of the Bush cuts permanent in 2013, ran an unpaid $1.9 trillion stimulus into a recovery (2021), and added $1.2 trillion by executive action. They failed to fill the hole. They did not dig most of it.

Every figure in the main text is documented, with sources, in the appendices.

By tenure, it may be close

Source: FRED series FYGFGDQ188S (OMB and St. Louis Fed), quarterly, Q4 2000 to Q1 2026.

Measured inauguration to inauguration, the debt-to-GDP ratio rose about 35 points under Republican presidents and 31 under Democrats. Start the clock at each president's first full budget year, the first year that runs on his own budget, and the gap widens to 40.5 points against 26.7.

By laws, it isn't close

To compare a 2001 law with a 2025 law, measure each one by its ten-year cost as estimated when it passed, then scale it to the size of the economy that year. A score of 10% means borrowing equal to a tenth of that year's GDP. Because each score uses a different year's GDP, adding them up shows the laws' relative size, not the rise in the debt ratio.

Then assign each law to the party whose votes passed it, or call it bipartisan when both parties gave it substantial support. Responses to the 2008 crisis and to COVID count separately as emergencies.

Source: Appendix A scorecard: CBO and JCT ten-year scores at enactment, divided by nominal GDP in each law's year.

Outside emergencies, laws passed mainly on Republican votes added 38% of a year's GDP. Laws passed mainly on Democratic votes cut deficits slightly. Most of the bipartisan total comes from extending the Bush tax cuts and from the wars Bush launched. The crisis borrowing of 2008 and 2020, counted separately, was bipartisan too.

Source: Appendix A scorecard: CBO and JCT ten-year scores at enactment, divided by nominal GDP in each law's year.

Read the bars top to bottom and the pattern is plain. The red Republican-led block at the top is almost all tax cuts. The purple bipartisan middle holds the deals that extended those cuts, the wars, the crisis responses and the two debt-ceiling deals that cut deficits. The blue Democratic-led block at the bottom is small, and half its laws cut deficits.

Four major laws cut deficits. All four passed under a Democratic president, and two of them, the debt-ceiling deals, were forced on that president by a Republican House. Among major laws, Republicans cut deficits only when a Democrat held the White House.

Three tax cuts, three broken promises

Every Republican government since 2000 has run the same play. Cut taxes, mostly at the top, without paying for it. Promise that growth will cover the cost. Leave the bill to whoever comes next.

George W. Bush inherited a surplus and cut taxes twice, in 2001 and 2003. Then he added a Medicare drug benefit with no funding at all.

Donald Trump inherited a steady expansion and cut taxes again in 2017, with unemployment near 4%. Even counting the growth it produced, CBO found the law added nearly $1.9 trillion over a decade; growth recovered only a fifth of the cost. In 2025, with deficits already near 6% of GDP, Republicans did it again, with a law CBO scored at $4.1 trillion including interest. Tariffs were sold as the offset, until the Supreme Court struck most of them down.

Neither version of the theory held. The cuts did not pay for themselves. Nor did the deficits they created "starve the beast," the idea that lost revenue would force Congress to cut spending. Spending kept rising while revenue fell. By the Center for American Progress's count, the Bush and Trump tax cuts explain 57% of the rise in the debt ratio since 2001. Set aside the two crisis responses, and they explain more than 90%.

Source: FRED series FYFRGDA188S and FYONGDA188S (OMB and St. Louis Fed), fiscal years 2000 to 2025.

After the Bush cuts, revenue fell to 15.4% of GDP by 2004. After Trump's, it sat near 16% in 2018 and 2019. Both times the economy was growing. Revenue has not regained its 2000 level since, while spending has climbed with an aging population and rising interest costs.

Wars on the credit card

World War II, Korea and Vietnam all brought tax increases. Afghanistan and Iraq were fought alongside tax cuts. Democrats share the votes to go to war, and Obama ran the Afghanistan surge. But the decision to fight two wars and cut taxes at the same time belongs to the Bush administration and its Republican Congress. Congress appropriated about $1.6 trillion for those wars through 2014, none of it paid for. Counting veterans' care and interest, the full bill runs near $8 trillion.

The third war is Trump's alone. He launched it against Iran in February 2026 without congressional authorization, and pressed on after the House voted to end it. CBO puts the Pentagon's cost at about $38 billion through August, rising by roughly $3 billion a month, with the energy shock adding about half a point to inflation.

Obamacare: one party paid, the other stripped the funding

The Affordable Care Act shows the difference in fiscal character most clearly. Democrats paid for their largest new program with taxes on high earners, fees on insurers and device makers, and Medicare savings. CBO scored it as cutting deficits by $143 billion in its first decade. Not one Republican voted for it.

Republicans then spent years trying to strip out its financing. Their 2017 repeal bill would have scrapped the high-earner taxes; it died in the Senate. In 2019 they did repeal $373 billion of the law's taxes. In that year-end deal, Democrats traded away the "Cadillac" tax on high-cost employer health plans, which unions hated. In 2025 they cut Medicaid.

Compare the Republicans' own health entitlement from 2003, the Medicare drug benefit known as Part D. It had no financing at all.

Two massive tail-risk failures on Republican watches

The federal government's first job is to protect the public from catastrophic tail risks: rare events that do enormous damage. It failed that test twice in twenty years, and both failures came on Republican watches.

The financial crisis grew under Bush's regulators. The bipartisan inquiry commission found it avoidable and put the main blame on regulators who failed to stop toxic mortgage lending. The deregulation that set the stage passed under Clinton with votes from both parties. But the bubble inflated, and the warnings were ignored, in the Bush years.

COVID arrived on Trump's watch. Obama had created a White House pandemic office after Ebola. In 2018 Trump's national security adviser folded it into a broader directorate and left its top post unfilled. When the virus came, the federal response faltered. The U.S. went on to suffer the highest excess death rate among large, wealthy countries over 2020–21, a failure that outlasted his term.

The borrowing that followed each crisis was bipartisan, and much of it was unavoidable. What was avoidable was the starting point -- and perhaps the crisis itself. Republicans had already spent the country's fiscal room in good times, so each crisis piled new debt on top of debt that need not have been there.

What Democrats own

Democrats are not innocent. In 2013 Obama signed the deal that made 82% of the Bush tax cuts permanent, a $2.8 trillion decision most House Democrats voted for. In 2021 Biden pushed through a $1.9 trillion relief bill, unpaid, into an economy that was already recovering. His executive actions, mostly student-loan relief, added another $1.2 trillion. And neither party has a plan for Social Security, Medicare or interest costs.

But look at the shape of it. Democrats extended tax cuts Republicans wrote, against an expiration date Republicans had built in. Their big unpaid bills were crisis responses. Their permanent programs came with financing. Count the 2021 relief bill as non-emergency spending and the Democratic total still comes to about $1.5 trillion, against $6.9 trillion for Republicans. Democrats failed to fill the hole. Republicans dug it.

Source: Appendix A scorecard, re-summed under each judgment call listed there.

Charge Democrats for making the Bush cuts permanent and for the 2021 relief bill, and the gap narrows to about 15 points of GDP. It never closes.

The Republican defense, and why it fails

Republicans have three serious answers. None changes the verdict.

"It's spending, not taxes." Spending is high, mostly because Social Security, Medicare and interest grow on autopilot under old laws. But revenue is where policy changed, and three Republican laws are why revenue sits below what an aging country needs. Conservative analysts argue the 2001–03 cuts explain only a small share of the early deficits. That analysis stops in 2011, before the cuts were made permanent and before two more rounds.

"Divided government worked." True: Republican Houses forced real deficit cuts on Democratic presidents in 2011 and 2023. But every time Republicans held the White House and both chambers, in 2001, 2003, 2017 and 2025, they cut taxes without paying for it. Their discipline appears only when Democrats hold the presidency.

"Americans aren't poorer." Median household income did hit a record in 2025. But the gains are lopsided, and the 2025 law makes them more so: CBO finds it takes about $1,200 a year from the poorest tenth of households and gives $13,600 to the richest tenth.

Verdict

Since 2000, the party that campaigns on fiscal discipline has been the main author of America's structural deficit, the gap between spending and revenue that persists even in good times. Three times it cut taxes without paying for them, each time promising growth would cover the cost, and each time CBO, and then the debt, proved otherwise. It fought two wars on borrowed money and started a third without asking Congress. It was in charge when both great tail-risk failures arrived, and it had already spent the fiscal room needed to absorb them.

Democrats share the blame for locking in most of the Bush cuts and for borrowing too much in 2021. But the fair headline is not that both parties did it. It is that one party dug most of the hole, and the other did too little to fill it.