By Catie Edmondson

Copyright nytimes

“That’s just another excuse,” Senator Ben Ray Luján, Democrat of New Mexico, said of Mr. Trump’s comments. “They’re doing this time and time again. They’re going to do what they want to do.”

Democrats and Republicans both stuck to their respective demands on Tuesday, and they appeared set to spend the day blaming each other for the impasse and the resulting shutdown that appeared more likely with each passing moment. Republican leaders have insisted that Democrats accept a House-passed bill that would simply extend federal funds at current levels through Nov. 21.

Democrats are demanding more than $1 trillion to extend Obamacare subsidies that are set to expire at the end of the year and roll back cuts to Medicaid and other health program that Republicans included in their marquee tax cut and domestic policy law that was enacted over the summer.

If the Obamacare tax credits are allowed to lapse, about four million people are projected to lose coverage starting next year, and prices would go up for an additional 20 million people. The Congressional Budget Office has projected that 10 million more Americans would become uninsured by 2034 as a result of the health cuts in the new tax law.

Senator John Thune, Republican of South Dakota and the majority leader, has said he would be willing to negotiate separately on extending the tax credits. Many of his senators who are up for re-election next year have endorsed the move. But Democrats were taking government funding “hostage,” Mr. Thune said.