(WASHINGTON) — President Donald Trump is calling on Mexico to block MS-13 gang members from traveling through their country on the way to the U.S.Trump tweets that gang members are being removed “by the thousands” by federal law enforcement agents, “but these killers come back in from El Salvador, and through Mexico, like water.” MS-13 gang members are being removed by our Great ICE and Border Patrol Agents by the thousands, but these killers come back in from El Salvador, and through Mexico, like water.