The National Federation of Independent Business, however, has opposed the measure over a requirement that businesses with 500 or fewer employees provide paid sick and family leave, even though the federal government would cover the tab. On the other end of the political spectrum, the United Food and Commercial Workers International Union blasted the bill as “weak” and “unacceptable” because it would exempt big corporations who employ about 80 percent of the workforce.

Senator Ron Johnson of Wisconsin, an ally of the president, criticized the paid sick leave provision in a statement Saturday and pushed for an alternative approach that would have states alter unemployment insurance programs to pay workers staying home because of the virus.

“I hope the Senate will approach this with a level head and pass a bill that does more good than harm – or, if it won’t, pass nothing at all,” he said. “The president and states already have adequate authority and funding to address the current situation.”

In a statement Sunday night, McConnell said the Senate was still awaiting the final version of the House bill.

“I know Senators on both sides are carefully reviewing the details and are eager to act swiftly to help American workers, families, and small businesses navigate this challenging time,” he said.

The Senate this week also is set to consider an extension of authorities under the U.S. Foreign Intelligence Surveillance Act that expired on Sunday. Until that’s passed, any action on the virus relief bill would require unanimous consent, according to McConnell’s office.

Senate Democrats expressed their frustration that the Senate isn’t moving more quickly even as the virus continues to spread.

Dick Durbin of Illinois, the No. 2 Senate Democrat, called on McConnell Sunday to pass the bill along with any bipartisan fixes, as well as a temporary extension of FISA authorities, by unanimous consent so senators don’t have to fly back to Washington.

“Your decision to call us back to Washington this week is unnecessary and puts many innocent people at risk,” Durbin said.

Mnuchin said Saturday that the House will have to pass technical corrections to the bill, which was drafted on the fly Friday night during lengthy negotiations between him and House Speaker Nancy Pelosi before its passage by the House after midnight on Saturday.