Lawmakers are trying to hammer out a final deal by Friday, when Congress hits the deadline to pass legislation to keep the government funded. Leaders from both parties hope to attach the Covid-19 aid package to the government funding bill.

"As far as the deadline on Friday — it could, I mean by the time everything gets processed, but I think there's a real incentive to get it done by then," Thune said. "I think both sides are sufficiently motivated given the time of the year and everything that's at stake and trying to get virus relief out there