The Senate is expected to vote on the stop-gap measure to keep the government funded through February 16.
The finger-pointing over who should be blamed intensified Friday, with minority Democratic lawmakers charging that the Republicans and White House had failed to deliver on fixing the Deferred Action for Childhood Arrivals program, which protects about 700,000 people who came to the United States illegally as children.
In a press conference this afternoon, Rep. Steny Hoyer (R-Md.) said that, "We will not be blackmailed because our Republican colleagues will not compromise'".
The government is set to run out of funding at midnight Friday.
While the House passed a short-term spending bill to keep the government running for another month Thursday night, the effort is likely to fail in the Senate, leaving Washington still careening toward a shutdown with one day left on the clock.
When asked if he believes the government will shut down at midnight, Cassidy said, "I don't know that".
Senate Majority Leader Mitch McConnell has scheduled a key procedural vote Friday night on a plan to avert a government shutdown, but it's still unclear if there are enough votes to keep the government open.
That was at the end of the 2017 fiscal year, when the House and Senate agreed on a short-term spending bill with 11 legislative days to go before the funding deadline on September 30.
If passed, the measure would be the fourth short-term spending bill since the fiscal year began in October, and some Republicans are pushing for longer-term planning.
The last government shutdown occurred in 2013 after Republican lawmakers refused to support a spending bill that included funds for the Affordable Care Act, known as Obamacare.
The problem? That bill doesn't address a solution to protect undocumented immigrants who were brought here illegally as kids.
"And now they are threatening to crowd out the needs of veterans, military families, opioid treatment centres and every other American who relies on the federal government - all over illegal immigration".