WASHINGTON (AP) — President Joe Biden urged Republican senators to "get out of the way" and let Democrats suspend the nation's debt limit, hoping to keep the U.S. government from bumping dangerously close to a credit default as Senate Republican leader Mitch McConnell refuses to lend his party's help.

Biden's criticism on Monday came with Congress facing an Oct. 18 deadline to allow for more borrowing to keep the government operating after having accrued a total public debt of $28.4 trillion. The House has passed a measure to suspend the debt limit, but McConnell is forcing Senate Democrats into a cumbersome process that could drag on and approach the deadline with little margin for error.

Both Biden and McConnell have promised that the country will avoid default, yet the public fight and political posturing risks an economic meltdown. The global economy relies on the stability of U.S. Treasury notes, and unpaid debt could crush financial markets and hurl America into recession. Biden noted that the debt limit applies to borrowing that has already occurred, including under former President Donald Trump, and said Republicans are hurting the country by blocking the limit's suspension.

"They need to stop playing Russian roulette with the U.S. economy," Biden said at the White House. "Republicans just have to let us do our job. Just get out of the way. If you don't want to help save the country, get out of the way so you don't destroy it."

Unmoved, McConnell said Republicans had given the Democrats a roadmap for dealing with the debt ceiling with months of warning.

"I suggest that our Democratic colleagues get moving," McConnell said at the Capitol.

Once a routine vote, raising the nation's debt limit has become increasingly partisan. It's become a favorite political weapon of Republicans to either demand concessions or force Democrats into unpopular votes to enable more borrowing. McConnell has tied the vote to Biden's multitrillion-dollar tax and economic agenda  that awaits Congressional approval. But Biden says the price tag in terms of debt for his plan will be "zero," paid for by raising taxes on corporations and on the wealthy, whom the House Democrats have defined as individuals earning more than $400,000 a year, or couples making more than $450,000.

Biden said he planned to talk with McConnell, who dug in with a letter of his own to the president.

"We have no list of demands. For two and a half months, we have simply warned that since your party wishes to govern alone, it must handle the debt limit alone as well," the Kentucky senator wrote in the Monday letter.

The financial markets have stayed relatively calm with interest rates on 10-year Treasury notes holding just below 1.5%. That rate is slightly higher than the all-time lows set last year as the coronavirus pandemic spread, but it's still lower than at any other time over nearly 60 years of data tracked by the Federal Reserve.

Treasury Secretary Janet Yellen has projected the government will exhaust its cash reserves on Oct. 18, an event she says would likely trigger a financial crisis and economic recession. Senate Majority Leader Chuck Schumer warned Monday that it would be hazardous for the economy to come anywhere near that deadline.

"The consequences of even approaching the X date could be disastrous for our economy and devastating to American families, raising the costs of borrowing for average Americans and hampering our economic recovery over the long-term," Schumer said in a letter to Democratic senators.

Democrats and Republicans are in a standoff over how to handle an extension for the debt ceiling. Republicans are insisting that Democrats go it alone with the same legislative tool that is already being used to try and pass Biden's plan to boost safety net, health and environmental programs. Democrats say that extending the debt limit has traditionally been a bipartisan effort and that the debt cap was built up under presidents from both parties.

Schumer said that if the debt issue is not resolved this week, the Senate will likely be forced to remain in session during the weekend and possibly the following week when senators were scheduled to be back in their home states.

Schumer also discussed the current state of play with the bipartisan $1 trillion infrastructure bill that has already passed the Senate and is stuck in the House, as well as Biden's larger, $3.5 trillion effort focused on social programs and the environment that would be offset by tax increases on corporations and the wealthy. He noted that the president visited with House Democrats on Friday to generate support for both measures.

"He encouraged them to stick together, compromise, and find the sweet spot that will allow us to complete our work," Schumer said. "I agree with his sentiment wholeheartedly – we can get this done, together, if we put aside our differences and find the common ground within our party."

Biden discussed the larger plan with progressive House Democrats during a virtual meeting Monday afternoon. And Schumer, House Speaker Nancy Pelosi and top White House advisers huddled late Monday at the Capitol over it.

"We're making progress, Pelosi said as she exited. Schumer had said in an earlier letter to colleagues they need to reach a deal soon, preferably "days, not weeks."

Schumer and McConnell debated the debt ceiling when the Senate earlier Monday.

McConnell noted that Biden voted against raising the debt ceiling as a senator when Republicans controlled Congress and the presidency.

But Schumer said Democrats allowed for an up-or-down vote back then rather than requiring the majority to overcome a filibuster. He said Republicans should follow that example when he seeks to bring up the House-passed bill that would suspend the debt ceiling until December 2022.

"We aren't asking Republicans to support it when it comes time for a vote. We only ask that they get out of the way, let Democrats pass it on our own just as the majority party did in the early 2000s," Schumer said.

"The fact is we don't have the luxury of waiting until Oct. 18 to extend the debt ceiling," Schumer added. "Even a near miss can have dramatic consequences."

Biden will be traveling to Michigan on Tuesday to promote his legislative plan as negotiations resume in Washington. Democratic Sens. Joe Manchin of West Virginia and Kyrsten Sinema of Arizona have said they won't back a $3.5 trillion spending bill. And many House Democrats won't support the smaller bipartisan infrastructure plan until they get an agreement on the larger measure.

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AP Congressional Correspondent Lisa Mascaro contributed to this report.