Trump told reporters as he left the White House that he was still holding out hope for a deal, but that if it "doesn't work out, probably I will do it".
If Trump declares a national emergency, he could dip into a $13.9 billion Army Corps of Engineers fund intended for public works, NBC reported.
The House of Representatives approved legislation Friday to fund and reopen the Interior Department, the Environmental Protection Agency and other federal agencies impacted by the partial government shutdown, though the measure is expected to be dead on arrival in the Senate and faces a White House veto threat.
President Trump has been briefed about using disaster-relief money meant to help storm-soaked Puerto Rico and fire-ravaged California to build his border wall, according to a report. He claimed his lawyers told him the action would withstand legal scrutiny "100 percent". "Nothing like a wall".
McAllen is located in the Rio Grande Valley, the busiest part of the border for illegal border crossings. "What is manufactured is the use of the word 'manufactured, '" Trump said. Across the street, a smaller group chanted back: "Build that wall!"
The president has blamed the shutdown on Democrats, and Democrats have blamed the shutdown on the president.
WASHINGTON, DC - DECEMBER 11: President Donald J. Trump debates with Senate Minority Leader Chuck Schumer, D-N.Y., during a meeting with House Minority Leader Nancy Pelosi, D-Calif., and Vice President Mike Pence in the Oval Office of White House on Tuesday, Dec. 11, 2018 in Washington, DC. He was to leave January 21 to attend the World Economic Forum.
That's the same length of time as the 21-day shutdown that stretched from December 1995 to January 1996 as a result of a clash between President Bill Clinton and the GOP Congress.
This article was written by Catherine Lucey, Lisa Mascaro and Zeke Miller from The Associated Press and was legally licensed through the NewsCred publisher network.