A group of bipartisan lawmakers emerged as the negotiators behind a potential deal to end the gridlock and reopen the government.
After decades of fruitless efforts to overhaul immigration and under withering attack by President Trump and others, Democrats simply do believe Republicans will follow through on the issue.
Lawmakers remained mired in partisan disputes as Senator Mitch McConnell said he would move ahead with a vote on a temporary spending bill by 1 a.m. Monday.
The vast machinery of the federal government began grinding to a halt, but much of the bureaucracy will stay in motion for a while.
As Democrats pushed the government toward a shutdown, they could take solace in the rapid-fire news cycles of the Trump era. A crisis now may be long forgotten by November.
The government will shut down at midnight Eastern Time if lawmakers fail to get an agreement on a spending bill.