Biden slams GOP's debt-ceiling stance as unacceptable.

President Biden warns that congressional Republicans could use a national default to damage him politically and acknowledges time has run out to use potential unilateral actions to raise the federal borrowing limit. Talks between the White House and congressional Republicans remain far apart, with Republicans seeking spending cuts in the federal budget in exchange for their support to raise the nation’s borrowing limit. Treasury Secretary Janet Yellen has warned the US could default on its debts as soon as June 1.