Senate Minority Leader Chuck Schumer, D-N.Y., said President Donald Trump is causing a “constitutional crisis” amidst his feud with a federal judge who ordered the president to stop deportation flights being conducted under the Alien Enemies Act. Senate Minority Leader Chuck Schumer, D-N.Y., said President Donald Trump is causing a “constitutional crisis” amidst his feud with a federal judge who ordered the president to stop deportation flights being conducted under the Alien Enemies Act.