Sen. Mitch McConnell met with Vice President Joe Biden last night. Will their work be undone today? (Creative Commons)

Vice President Joe Biden and Republican Sen. Mitch McConnell made progress Sunday in late-night negotiations, and the full Senate will reconvene at 11 a.m. ET Monday to resume talks.

But according to The New York Times, hints of progress could be proven wrong if just one senator objects to any deals offered Monday, pushing the process back further until Congress comes back in session Thursday.

From The Times: 

Representative Kevin McCarthy, a California Republican and the House majority whip, advised House members at 9 a.m. “to remain close to the Capitol as additional legislation and votes are possible pending action from the Senate.”

And while the rest of the country has been growing increasingly anxious, things don't look so great inside the chambers either.

“It looks awful,” said Senator Richard J. Durbin of Illinois, the second-ranking Democrat. “I’m sure the American people are saying, with so much at stake why are they waiting so late to get this done?”

Senator Lindsey Graham, Republican of South Carolina, who had said early Sunday that he thought a deal was within reach, said later on his Twitter feed, “I think we’re going over the cliff.”

President Obama has been pushing for a stop-gap measure to hold onto lower tax rates for Americans with incomes below $250,000 and extend unemployment benefits. The Times pointed out that may not come to a vote Monday.

Check out what Twitter users had to say on the last day before the country steps off the fiscal cliff.

Reach Executive Producer Catherine Green here. Follow her here.