WASHINGTON — U.S. President Donald Trump on Wednesday re-designated Yemen’s Houthi movement, known formally as Ansar Allah, as a “foreign terrorist organization,” the White House said. The move will impose harsher economic penalties than the Biden administration had applied to the Iran-aligned group in response to its attacks on commercial shipping in the Red Sea and against U.S. warships defending the critical maritime chokepoint. Proponents of the move say it is overdue, though some experts say it could have implications for anyone seen as aiding the Houthis, including some aid organizations. “The Houthis’ activities threaten the security of American civilians