President Biden stated on Sunday that he believed he had the authority to problem the constitutionality of the nation’s borrowing restrict however that he didn’t imagine such a problem may reach time to keep away from a default on federal debt if lawmakers didn’t elevate the restrict quickly.

“I feel now we have the authority,” Mr. Biden stated at a information convention after the Group of seven summit in Hiroshima, Japan. “The query is may it’s executed and invoked in time.”

Mr. Biden added that after the present disaster is resolved, he hopes to “discover a rationale and take it to the courts” to determine whether or not the debt restrict violates a clause within the 14th Modification stipulating that the US should pay its money owed. He additionally stated that, whereas assembly with world leaders, he had not been in a position to guarantee them that America wouldn’t default on its debt — an occasion that economists say may set off a monetary disaster that will sweep the globe.

“I can’t assure that they won’t drive a default by doing one thing outrageous,” Mr. Biden stated, referring to congressional Republicans who’ve insisted on deep cuts to federal spending in alternate for elevating the borrowing restrict.

Mr. Biden and Speaker Kevin McCarthy are negotiating over a fiscal bundle that would come with elevating that borrowing ceiling. They continue to be far aside on key points, together with on caps for federal spending, new work necessities for some recipients of federal antipoverty help and funding meant to assist the I.R.S. crack down on excessive earners and companies that evade taxes.

The 2 males have been set to talk by phone on Sunday shortly after the information convention as Mr. Biden made his approach again to Washington in hopes of re-energizing the sputtering talks. The dialog will observe a weekend by which Republican leaders and White Home officers have traded accusations from half a world away — punctuated by Mr. Biden’s assaults on Republicans within the information convention.

Treasury Division officers estimate that there are simply over two weeks earlier than the federal authorities may lose its capacity to pay its payments on time, forcing a default. Each Mr. Biden and Mr. McCarthy expressed rising optimism late final week that they may attain an settlement that will pave the best way for Congress to lift the borrowing restrict whereas additionally decreasing some federal spending, which Republicans have insisted on as a situation for any debt-limit improve.

Treasury Secretary Janet L. Yellen is predicted to offer one other replace to Congress on the federal authorities’s money stability someday this week. On Sunday, Ms. Yellen indicated that her projections that the US may very well be unable to pay all of its payments on time as quickly as June 1 haven’t modified.

“I actually haven’t modified my evaluation, so I feel that that’s a tough deadline,” Ms. Yellen stated on NBC’s Meet the Press program.

Ms. Yellen famous that the federal government is anticipating to obtain substantial tax funds on June 15 that might lengthen the so-called X-date later into the summer season. However she warned that it will be very troublesome to get to that date and that the chances of creating it that far are “fairly low.”

The Treasury secretary, who warned final week {that a} default would “generate an financial and monetary disaster,” stated she isn’t exaggerating the gravity of the looming disaster.

“There might be onerous selections to make if the debt ceiling isn’t raised,” Ms. Yellen stated, explaining that in if the U.S. runs out of sufficient cash to pay all its payments, some must go unpaid.

These hopes have dimmed at the very least barely within the final 48 hours. Mr. Biden’s aides accused Republicans of backsliding on key areas of negotiation, and Republicans accused the White Home of refusing to budge on prime priorities for conservatives.

Mr. Biden on Sunday criticized Republicans for not contemplating elevating further tax income to cut back future finances deficits as a part of the negotiations. He stated he had proposed a discretionary spending cap that will save $1 trillion over a decade in contrast with baseline projections.

“It’s time for Republicans to simply accept there is no such thing as a finances deal to be made solely on their partisan phrases,” he stated.

A number of the barbs gave the impression to be meant to shore up every get together’s base. Arduous-line spending hawks within the Home have urged Mr. McCarthy to demand far higher concessions from Mr. Biden. Some progressive Democrats have pushed Mr. Biden to chop off negotiations and as an alternative act unilaterally to problem the debt restrict on constitutional grounds.

The 2 sides have discovered some settlement in talks within the final week, together with on clawing again some unspent funds from beforehand accepted Covid reduction laws. They’ve additionally agreed in broad phrases to some kind of cap on discretionary federal spending for at the very least the following two years. However they’re hung up on the main points of these caps, together with how a lot to spend total subsequent fiscal 12 months on discretionary applications — and the best way to divide that spending among the many navy and different applications.

The newest White Home supply would maintain each navy spending and different spending — which incorporates training, scientific analysis, environmental safety and extra — fixed from the present fiscal 12 months to subsequent fiscal 12 months, based on an individual accustomed to either side’ proposals. That transfer wouldn’t scale back nominal spending earlier than adjusting for inflation, which Republicans are pushing onerous to do. Requested by a reporter on Sunday, Mr. Biden stated the spending discount he had proposed wouldn’t trigger a recession.

A invoice that Republicans handed final month that paired spending cuts with a debt-limit improve would convey internet financial savings of about $5 trillion over a decade in contrast with present projections.

Republicans’ newest proposal features a nominal drop in whole discretionary spending subsequent 12 months. However that lower isn’t evenly distributed; of their plan, navy spending would proceed to rise, whereas different applications would face deeper cuts.

Mr. Biden’s supply would set spending caps for 2 years. Republicans would set them for six years.

Republicans have additionally proposed a number of efforts to economize that White Home officers have objected to. They embrace new work necessities for recipients of Medicaid and the Short-term Help for Needy Households program. They’d additionally make it more durable for states to hunt waivers for work necessities for sure recipients of federal meals help who stay in areas of sustained excessive unemployment — a proposal that was not within the Republican debt-limit invoice that handed the Home.

Republicans are additionally persevering with to hunt a discount in enforcement funding for the I.R.S., a transfer that the Congressional Price range Workplace estimates would really make the finances deficit bigger by decreasing future federal tax receipts. And so they have sought to incorporate some provisions from a stringent immigration invoice that not too long ago handed the Home, based on an individual accustomed to the proposal.

“We’re all involved about deficits and financial duty, however deficits will be addressed each by means of adjustments in spending and thru adjustments in income,” Ms. Yellen stated, including that she was “vastly involved” about proposals by Republicans to chop funding for the I.R.S.

Republican leaders on Saturday continued in charge White Home negotiators for what they known as the deterioration in discussions.

“The White Home is transferring backward in negotiations,” Mr. McCarthy wrote on Twitter. In a separate publish, he blamed Mr. Biden for the deadlock, saying that the president didn’t “suppose there’s a single greenback of financial savings to be discovered within the federal authorities’s finances.”

Mr. Biden insisted on Sunday that he was prepared to chop spending. He additionally instructed that some Republicans have been attempting to crash the financial system by not elevating the borrowing restrict, as a way to damage Mr. Biden’s hopes of successful re-election.

If the nation have been to default, Mr. Biden stated, “I might be innocent” on the deserves — that means that it will be Republicans’ fault. However, he stated, “on the politics of it, nobody can be innocent.”

“I feel there are some MAGA Republicans within the Home who know the injury that it will do to the financial system, and since I’m president, and the president’s chargeable for the whole lot, Biden would take the blame,” he stated.

Alan Rappeportcontributed reporting.