The tentative agreement is "still not final," according to Antonia Ferrier, the communications director for House Republican Whip Roy Blunt (Mo.).
"Democrats and Republicans worked in good faith to come up with a proposal that is promising in principle, but that is still not final," Ferrier said on Sunday afternoon.
"Bipartisan staff from the House and Senate continue to review and draft the legislation," she said. "We hope to have a final product by later this afternoon."
Leaders on both sides of the aisle are gearing up for their respective caucus meetings this afternoon. Opponents in both parties are expected to express their complaints in an effort to sway undecided colleagues.