Trump says he would veto measure blocking emergency declaration

WASHINGTON (Reuters) - U.S. President Donald Trump, a Republican, said on Friday he would veto a measure to block the national emergency declaration he issued to build a wall along the U.S. southern border with Mexico. Trump issued the declaration last week when Congress did not fulfill his demand for $5.7 billion this year to help build the wall. The Democrat-majority House of Representatives earlier on Friday introduced a resolution aimed at stopping the declaration, with plans to vote on it on Tuesday. If passed in both congressional chambers, Congress would require a two-thirds majority to override a presidential veto. (Reporting by Jeff Mason; Writing by Makini Brice; Editing by James Dalgleish)