The bipartisan group of rank-and-file senators who have been negotiating a way out of the shutdown are mulling over a number of modifications to the bill. Lawmakers are expected to attempt to change the date that the short-term extension of government funding expires to a yet-to-be-determined later day.

Senate Republicans have a different strategy to end the government shutdown after making an offer to the Democrats for Friday's vote.

The Senate map doesn’t look great, but if there’s any hope of winning, we have to be aggressive,” said one consultant.