The U.S. Senate took its first major step toward resolving the ongoing federal government shutdown on Sunday, voting 60-40 to move ahead with a compromise funding package, though the plan leaves unresolved key issues such as the extension of Affordable Care Act (ACA) tax credits.

Under the agreement, three annual spending bills would be advanced, and overall government funding would be extended through late January. In exchange for that extension, a mid-December vote is now scheduled to address the expiring ACA tax credits set to lapse on Jan. 1.

The deal was brokered after moderate Democrats broke from their caucus to support the motion, infuriating more progressive members. Senate Democratic Leader Chuck Schumer voted against moving forward, joined by the majority of his party.

But the legislation does not guarantee that the ACA subsidies will be extended, a point of major contention. Critics argue the move sidesteps the core demand of Democratic leadership to secure health-care protections for millions of Americans.

The shutdown’s impact has worsened: flight cancellations numbered in the thousands, food assistance programs have been delayed, and federal employees continue to go without regular pay.

With the vote behind them, lawmakers now face the delicate task of finalizing the funding package and winning broader support, all while the shutdown record grows ever longer.