A compromise $10 billion measure buttressing the government’s COVID-19 defenses has stalled in the Senate and seemed all but certainly sidetracked for weeks, victim of a campaign-season fight over the incendiary issue of immigration.

There was abundant finger-pointing Wednesday but no signs the two parties were near resolving their stalemate over a bipartisan pandemic bill that President Joe Biden and top Democrats wanted Congress to approve this week. With Senate Majority Leader Chuck Schumer, D-N.Y., prioritizing the confirmation of Supreme Court nominee Ketanji Brown Jackson by week’s end — quite possibly Thursday — the COVID-19 bill seemed sure to slip at least until Congress returns after a two-week recess.

A day earlier, the GOP blocked the Senate from even beginning debate on the bill, which would increase funding for COVID-19 treatments, vaccines and testing. Republicans were demanding that Democrats allow a vote on an amendment preserving immigration curbs imposed by President Donald Trump that the Biden administration is slated to end on May 23.

“Why did Republicans say no? Because they wanted to cripple COVID funding legislation with poison pills that they knew would derail this bill,” Schumer said Wednesday.

Schumer and a team of GOP negotiators led by Utah Sen. Mitt Romney struck a deal Monday on the pandemic bill. Democrats say Republicans are walking away from that agreement.

“The question we have is whether Republicans are acting in good faith to provide the resources we need to save American lives, or if they’re just playing politics,” said White House press secretary Jen Psaki. “The virus is not waiting for Republicans in Congress to get their act together.”

While there would likely be at least the 10 GOP votes needed to push the pandemic bill through the 50-50 Senate, overall Republican support for it is tepid. And the GOP’s effort to refocus the fight to immigration — an issue that polls show hurts Biden — has clearly put Democrats on the defensive.