Biden and McCarthy race to sell their debt ceiling deal to lawmakers before the government runs out of money

The White House and Republican leaders in Congress were mounting an intensive push Sunday to consolidate support around a tentative agreement to raise the nation's borrowing limit, their urgent task made complicated by members of both parties voicing concerns over different provisions.

The "agreement in principle" clinched by House Republicans and the White House late Saturday was the culmination of mad-dash negotiations over the course of the past week that regularly stretched late into the night. Final text of the agreement was hammered out overnight by both sides.

But the marathon is far from over, and there remains little certainty the nation will avoid a default as both parties now work to rally support around the package.

The agreement - which would raise the debt ceiling for two years, freeze spending on domestic programs, increase spending on defense and veterans issues, impose some new work requirements on federal food assistance programs and change some rules around energy permitting - was meant to include provisions that could sway members of both parties to vote for it.

Yet after the deal's announcement, House members on both the left and right were already balking at some of the details said to be included in the package.

Congressional Progressive Caucus Chair Pramila Jayapal said White House negotiators and Democratic leaders should be concerned about securing progressive support for the deal.

"Yes, they have to worry," the Washington Democrat told CNN's Jake Tapper on "State of the Union," pointing to some of the concessions made by the White House to reach a deal, including the expansion of some work requirements for federal food aid.