With midterm elections set to produce divided government, any serious attempt to rein in US borrowing is now effectively off the table for at least two years.
The numbers alone paint a grim enough picture: the federal deficit reached $1.992 trillion in fiscal 2026, a 12% increase from the previous year and equivalent to roughly 6.2% of gross domestic product.
Yet it is the political arithmetic, more than the fiscal arithmetic, that is closing off escape routes and alarming economists who watch sovereign debt markets.
Republicans are widely forecast to lose at least the House of Representatives in the November 3 midterms, handing Democrats significant blocking power over any budget legislation.
Rep. Hakeem Jeffries, who would likely become the next House speaker, has already signalled his priority: reversing the $1 trillion in healthcare cuts Congress passed last year as part of Trump’s signature legislative package.
That starting position leaves the two parties separated by a vast ideological gulf, with deep personal animosity making compromise even less likely than the structural numbers suggest.
Meanwhile, the cost of Washington’s inaction is already showing up in the housing market, where the average 30-year fixed-rate mortgage is hovering around 7.5%, tracking a 10-year Treasury yield that reached 5.1% last week.
Pending home sales dropped 4% in September, the steepest monthly decline in three years, according to Redfin, illustrating how elevated borrowing costs are beginning to cool one of the economy’s most rate-sensitive sectors.
The 10-year yield has surged 114 basis points since the end of February, driven in part by the war with Iran, which began on Feb. 28 and rattled bond markets almost immediately as oil and diesel prices climbed sharply.
Bond traders, uncertain about whether central banks including the Federal Reserve will need to raise interest rates further in response to higher energy prices, have been demanding greater compensation to hold long-dated government debt.
Adding further pressure, the race to build artificial intelligence infrastructure has sent companies flooding debt markets with hundreds of billions in new issuance, intensifying competition for capital and giving global investors attractive alternatives to US Treasuries.
Treasury Secretary Scott Bessent has argued publicly that the country should target a deficit below 4% of GDP before President Donald Trump’s term concludes, framing fiscal discipline as the route to easing long-term yields.
“My view is that we’ve got this mountain of debt, and we have to grow our way out of it,” Bessent said in Dallas last month, pointing to artificial intelligence as a potential engine of future economic expansion.
The Congressional Budget Office currently forecasts the 10-year Treasury will average 4.3% over the next decade, well below today’s 5.1%, but every half-point by which rates exceed that projection adds roughly $1.9 trillion to cumulative deficits over ten years, the agency estimates.
A 1.5-point overshoot would pile an additional $6 trillion onto the national debt, a scenario that underscores just how much the interest burden amplifies the underlying spending problem.
Growth optimists point to the recent upward revision of second-quarter GDP from 1.5% to 2.2% annualised, but the Committee for a Responsible Federal Budget calculates it would take a full decade of 7.2% annual growth to balance the budget through expansion alone.
Total US debt crossed $40 trillion this year, and while economists disagree about what threshold triggers a genuine crisis, the trajectory is attracting serious concern from investors who have historically treated Treasuries as the world’s safest asset.
A true debt crisis, analysts warn, would look like the current pressures multiplied many times over, with yields spiking, global investors dumping dollar assets, and both the Treasury and the Federal Reserve left with few effective tools to respond.
For now, higher yields are simultaneously attracting fresh buyers into government bonds, a distinction that separates discomfort from catastrophe, but one that could narrow quickly if the political system remains unable to act.