"I am prepared to veto, if necessary," Trump said in an early-morning post on Twitter before senators took up the measure. (Jorge Duenes/Reuters)Under the emergency declaration Trump signed on Feb. 15, he would take money from other federal programs to build the barrier he says is needed. Democratic House Speaker Nancy Pelosi tried making it even harder for uncertain Republicans to support Trump's border emergency. She said the House would never even consider the separate bill limiting future declarations by presidents, including Trump. Presidents have never before declared an emergency after Congress voted to deny them money for the same purpose.

Source: CBC News March 14, 2019 14:15 UTC