The countdown to a government shutdown is now marked by hours as the Senate returns Monday afternoon to decide before midnight whether to accept the Republican House's weekend spending-bill offer, make a counter-proposal or let the clock expire.
House Republican leaders on Sunday chided Senate Majority Leader Harry Reid and others in the Democrat-led chamber for not hustling back to Capitol Hill to negotiate, after the lower chamber early Sunday morning passed its proposal, which includes a one-year delay on ObamaCare.
"O Senate, where art thou," said Tennessee Rep. Marsha Blackburn, riffing on the movie "O Brother, Where Art Thou."
The delay plan is in the form of an amendment to a temporary spending bill passed Friday by the Senate.
In a package of weekend votes, the House also agreed to an amendment to repeal the health care law's medical-device tax and voted in favor of a bill to pay the military on time should a shutdown occur.
Just hours after House Republicans announced their plan Saturday afternoon, the White House vowed President Obama would veto it and Senate Majority Leader Harry Reid made clear it was unacceptable.
"To be absolutely clear, the Senate will reject both the one-year delay of the Affordable Care Act and the repeal of the medical device tax," Reid said. "After weeks of futile political games from Republicans, we are still at square one."
On Sunday, Reid spokesman Adam Jentleson called the House votes "empty political stunts" and said, "Tomorrow, the Senate will do exactly what we said we would do and reject these measures."
Blackburn made her comments along with other members of the House Republican Conference at an informal press conference on the steps of Capitol Hill.
"That the senators are not here … is all that everyone needs to know," said Arkansas Republican Rep. Tim Griffin. "Democrats want to shutdown the government. … That's a scorched earth policy."
Grifffin and others tried to recast the blame for a possible shutdown on Democrats who have argued Republicans' insistence on tying a spending bill to ObamaCare is intended to force a shutdown.
"Today we see where the Senate doors are shut," said conference Chairwoman and Washington Rep. Cathy McMorris Rodgers. "Harry Reid says that a shutdown is inevitable."
House Speaker John Boehner was among the first to put the burden of responsibility back on the Senate.
"Now that the House has again acted, it's up to the Senate to pass this bill without delay to stop a government shutdown," the Ohio Republican said after the weekend votes. "Let's get this done."
The government would technically run out of money Monday night should Congress fail to pass a spending bill -- resulting in a partial government shutdown that would begin with hundreds of thousands of government workers likely being sent home from work without pay.
The government would still keep open operations and agencies that protect "life and limb," but national parks would likely close right away and other non-essential programs would also be temporarily shut down.
There have been 17 government shutdowns, the most recent lasting from Dec. 16, 1995, to Jan. 6, 1996 -- the longest in U.S. history.
House Majority Whip Kevin McCarthy said Sunday morning the chamber has several last-minute options to avoid a government shutdown should the Senate reject the most recent House plan.
The California Republican insisted the proposal can indeed pass in the Senate but acknowledged having an alternative plan.
"You assume they won't vote for it. Let's have that debate," he told "Fox News Sunday." But "we have other options for the Senate to look at."
Earlier this month, the Senate rejected a House spending bill to defund ObamaCare, despite a filibuster-style effort by Tea Party-backed, Texas GOP Sen. Ted Cruz.
McCarthy declined to tell Fox News whether one of the proposals would be passing a so-called "clean" spending bill, or continuing resolution, which would keep open the government for a few days until Congress agrees on a longer-term plan. But he insisted the House will not be responsible for a shutdown and that it will offer a proposal with Democratic support.
"We are not shutting the government down," he said. "While the president was out playing golf [Saturday], we were here until 1 a.m. We will pass a bill that reflects this House. … I think they'll be additions that Democrats can support."
Right now, the House bill covers government spending through Dec. 15, while the Senate bill goes through Nov. 15.