Pres Trump signs veto statement and gives pen to an "angel mom." Pres says "we're building a lot of wall right now." (TV Pool photo by @TerryMoran) pic.twitter.com/sd9F35If7G
— Mark Knoller (@markknoller) March 15, 2019
So, ultimately it will be up to the courts.
Via The Hill:
President Trump on Friday issued the first veto of his presidency, stymying Congress’s attempt to block him from obtaining funds for his wall at the U.S.-Mexico border without lawmakers’ approval.
Trump vetoed a resolution of disapproval of his emergency declaration that passed the House and the Senate. The measure won support from both parties, including 12 Senate Republicans, in what was seen as a significant rebuke of the president.
In an Oval Office ceremony, Trump said Americans would be put at risk if the “dangerous” and “reckless” resolution became law.
“Today I am vetoing this resolution. Congress has the freedom to pass this resolution, and I have the duty to veto it,” Trump said.