During a meeting with incoming House Speaker Nancy Pelosi and Senator Minority Leader Chuck Schumer last week, President Trump said he would shut the government down if he doesn't receive funding for the wall.
The White House has not provided details of that effort but leading Democrats have warned that shifting funds around in such a way would have to be approved by Congress. Congress often approves pay for such affected workers retroactively, even if they were ordered to stay home.
It does not provide $5 billion Trump wanted for the wall.
McConnell blamed the outcome on Democrats after they turned down a GOP offer yesterday that would have provided US$1.6 billion for border barriers and another US$1 billion for Trump to spend on other immigration priorities.
"I was promised the Wall and Border Security by leadership, " Trump tweeted shortly after calling Ryan during a morning meeting of House Republicans.
House Republican Mark Meadows had also said there was no excuse to back down on wall funding. Schumer said there will be no wall money, "plain and simple".
Trump can also pull money from the emergency Military Construction (MILCON) fund, which can be used without congressional approval in cases of national security.
"The president has informed us that he will not sign the bill that came over from the Senate last evening because of his legitimate concerns about border security", Ryan told reporters in front of the White House. At the time, Trump said he was "forced" to sign this bill in order to get funding for the military, and promised he would "never sign a bill like this again".
The turn of events kick-started negotiations that had been nearly nonexistent since last week's televised meeting at the White House, when Trump neither accepted nor rejected the Democrats' offer.
Republican Sen. Richard Burr of North Carolina, a leading advocate of the conservation fund, says he and other lawmakers are working to reauthorize the program before Congress adjourns for the year.
The announcement of such a short-term measure to fund the government at current levels, called a continuing resolution, is the biggest breakthrough yet in the recent standoff between the White House and Congress, as they look to avert a shutdown days before Christmas. "He has a responsibility to keep the government moving forward, and he has a responsibility to get border security".
A senior White House official told CNN Friday it's possible that Trump will decide not to back down on the wall fight as a result of growing pressure from the Freedom Caucus and conservatives. "Now is the time to fight".
President Donald Trump has solidified his suggestion that the USA military will build the wall along the southern border as the chances of Congress passing funding for the project by the December 21 deadline shrinks. We want a secure border. Urging him to veto, Trump's critics argue he will have even less leverage when Democrats take control of the House on January 3, and they worry that the unfilled pledge for a U.S. -Mexico border wall could hamper his re-election campaign. It's unclear if President Trump will sign the bill.
"The president's spokesperson has claimed that the administration can reprogram funds given to other areas of the government to build the full wall".