The deadline to avert the first shutdown since 2013 is midnight Friday.
Bill Hoagland, a senior vice president at the Bipartisan Policy Center and a former Republican Senate budget staff director, said government shutdowns and continuing resolutions have gone on for decades in Washington, but Friday's shutdown threat was different because it was the first time a shutdown has loomed while a single party has held both Congress and the presidency. Angus King, an independent from ME - said they were exhausted of continuing resolutions in general. "Making progress - four week extension would be best", Trump said in a tweet.
The US Congress is working to pass a spending bill that means the government will continue to be funded.
House Democrats gathered for lunch from We The Pizza on Friday to discuss strategy, bursting into spontaneous bouts of applause and cheers at time.
But the shutdown could also be problematic for 10 Democratic senators who are up for re-election this year in states won by Mr Trump.
The House passed a continuing resolution with a vote of 230 to 197 on Thursday night to avoid a government shutdown, sending the bill to the Senate to vote on before the weekend.
The chamber backed away from a plan to adjourn for a one-week recess Friday afternoon, meaning the GOP-controlled House could wait to see if a last-minute compromise would be reached requiring a new vote. A shutdown would not affect the military or other essential services. The government is now operating on its third temporary funding measure since the new fiscal year began in October.
The latest budget bill has been mired in controversy over demands by Democrats to include a measure to protect so-called Dreamers - undocumented immigrants who arrived to the United States as children - while Mr Trump has demanded funding for his proposed wall on the US-Mexican border. Though the impact would initially be spotty - since most agencies would be closed until Monday - the story would be certain to dominate weekend news coverage, and each party would be gambling the public would blame the other.
Trump gave Congress six months to find a legislative solution and initially suggested he would sign any agreement lawmakers came up with. "We understand it's pretty touch and go right now in Washington, but it doesn't seem like [a shutdown] is in the government's interests", said Bovino.
Mindful of the risks, Democrats have shifted their messaging in recent days to say their opposition is about much more than just immigration.
President Donald Trump entered the fray early Friday morning, mentioning the House-approved bill on Twitter, adding: "Democrats are needed if it is to pass in the Senate - but they want illegal immigration and weak borders". In years past, Democrats have warned against a shutdown.
"In theory, the Senate could deal with it before midnight and the House could in some fashion deal with it before midnight", he told reporters Friday. "I'm fed up with it", Rep. Mark Meadows, R-N.C., head of the House Freedom Caucus, said on MSNBC's "Morning Joe".
Mike Bennet said in tweets Thursday night he's still insisting on a measure that addresses DACA concerns. "We need to get his resolved, we need to get to agreement".
He told workers in Pennsylvania the gridlock is really about a booming economy. "We'll reach a deal that fully funds our military & the opioid fight, CHIP, vets, pensions, disaster aid & protects Dreamers".
As the blame-game intensified over who was responsible for the impending shutdown, a Washington Post-ABC poll found that 48 per cent of Americans blamed Mr Trump and the Republican party for the possible shutdown, with only 28 per cent blaming Democrats.
But Democrats say his decision to scuttle a DACA deal has led to the current situation - and many congressional Republicans privately agree.
The House passed a measure Thursday night to continue funding the government through mid-February.
And then on Thursday, Trump sent Republican lawmakers scurrying when he tweeted that "CHIP should be part of a long term solution, not a 30 Day, or short term, extension" - which is the proposal Republicans put on the table to curry Democratic support.
Among Republicans, 62% would blame the Democrats in Congress, while 43% of Democrats would blame Republicans on Capitol Hill and 29% would blame Trump.
Amid the deadlock, more senators were raising the possibility of merely approving enough new federal funds for a few days.