House Republicans are pushing debt ceiling talks to the brink, displaying risky political bravado as they prepare to leave town Thursday for the holiday weekend just days before the U.S. could face an unprecedented default that could hurl the global economy into chaos.

Speaker Kevin McCarthy said he’s directed his negotiating team “to work 24/7 to solve this problem.”

Arriving at the Capitol, McCarthy, R-Calif., said that “every hour matters” in talks with President Joe Biden’s team as they work toward a budget deal. Republican are demanding spending cuts the Democrats oppose, and McCarthy said a deal could come together “at any time.”

But it’s clear the Republican speaker — who leads a Trump-aligned party whose hard-right flank lifted him to power — is now staring down a potential crisis.

Lawmakers are tentatively not expected back at work until Tuesday, just two days from June 1, when Treasury Secretary Janet Yellen has said the U.S. could start running out of cash to pay its bills and face a federal default.

Fitch Ratings agency placed the United States’ AAA credit on “ratings watch negative,” warning of a possible downgrade because of what it called the brinkmanship and political partisanship surrounding the debate over lifting the debt ceiling.

“This is a battle between extremism and common sense,” said Democratic Rep. Katherine Clark of Massachusetts, the minority whip.

The Republicans, she said, “want the American people to make an impossible choice: devastating cuts or devastating debt default.”

No Deal After Weeks of Talks

Weeks of negotiations between Republicans and the White House have failed to produce a deal — in part because the Biden administration never expected to be having to negotiate with McCarthy over the debt limit, arguing it should not be used as leverage to extract other partisan priorities.

McCarthy is holding out for steep spending cuts that Republicans are demanding in exchange for their vote to raise the nation’s borrowing limit. The White House has offered to freeze next year’s 2024 spending at current levels and restrict 2025 spending, but the Republican leader says that’s not enough.

“We have to spend less than we spent last year. That is the starting point,” said McCarthy, R-Calif.

Failure to raise the nation’s debt ceiling, now at $31 trillion, would risk a potentially chaotic federal default, almost certain to inflict economic turmoil at home and abroad. Anxious retirees and social service groups are among those already making default contingency plans.

Even if negotiators strike a deal in coming days, McCarthy has promised lawmakers he will abide by the rule to post any bill for 72 hours before voting — now likely Tuesday or even Wednesday. The Senate, where Democratic Majority Leader Chuck Schumer has vowed to move quickly, would also have to pass the package before it could go to Biden’s desk to be signed into law, right before next Thursday’s possible deadline.

Pushing a debt ceiling increase to the last minute is not uncommon for Congress, which has been here before. But it leaves little room for error in a volatile political environment. Both Democrats and Republicans will be needed to pass the final package in the split Congress.

The contours of a deal have been within reach for days, but Republicans are unsatisfied as they press the White House team for more.

In one potential development, Republicans may be easing their demand to boost defense spending, instead offering to keep it at levels the Biden administration proposed, according to one person familiar with the talks and granted anonymity to discuss them.

The Republicans may achieve their goal of of rolling back bolstered funding for the Internal Revenue Service if they agree to instead allow the White House to push that money into other domestic accounts, the person said.

At the White House, press secretary Karine Jean-Pierre blamed Republicans for risking a devastating default that would hit “every single part of the country” as they demand “extreme” spending cuts that would hurt millions of Americans.

She decried what the administration called a “manufactured crisis” set in motion by the GOP.

Ending Tax Breaks for Wealthy Off the Table

The White House has continued to argue that deficits can be reduced by ending tax breaks for wealthier households and some corporations, but McCarthy said he told the president as early as their February meeting that raising revenue from tax hikes was off the table.

Donald Trump, the former president who is again running for office, has encouraged Republicans to “do a default” if they don’t get the deal they want from the White House.

While Biden has ruled out, for now, invoking the 14th Amendment to raise the debt limit on his own, Democrats in the House announced they have all signed on to a legislative “discharge” process that would force a debt ceiling vote. But they need five Republicans to break with their party and tip the majority to set the plan forward.

“Sign the bill!” Democrats yelled on the House floor after a Republican leader announced the holiday recess schedule.

Agreement on a topline spending level is vital. It would enable McCarthy to deliver spending restraints for conservatives while not being so severe that it would chase off the Democratic votes that would be needed in the divided Congress to pass any bill.

But what, if anything, Democrats would get if they agree to deeper spending cuts than Biden’s team has proposed is uncertain.

McCarthy has quipped that the Democrats “get a debt ceiling increase” — typically something both parties take responsibility for doing.

“The problem is not the White House. The problem is Kevin McCarthy and the extreme Republicans,” said Rep. Pramila Jayapal, D-Wash., the chair of the progressive caucus. “They are the ones holding this economy hostage, that are putting all these cuts on the American people.”

The negotiators are now also debating the duration of a 1% cap on annual spending growth going forward, with Republicans dropping their demand for a 10-year cap to six years. The White House initially offered only one year, for 2025.

Republicans want to beef up work requirements for government aid to recipients of food stamps, cash assistance and the Medicaid health care program that the Biden administration says would impact millions of people who depend on assistance.

All sides have been eyeing the potential for the package to include a framework to ease federal regulations and speed energy project developments. They are all but certain to claw back some $30 billion in unspent COVID-19 funds now that the pandemic emergency has officially been lifted.

The White House has countered by proposing to keep defense and nondefense spending flat next year, which would save $90 billion in the 2024 budget year and $1 trillion over 10 years.