That infamous Signal chat keeps coming back to haunt the Trump administration. On Tuesday, U.S. Ambassador to the United Nations Mike Waltz was interrupted in the middle of a speech before a U.N. General Assembly vote on whether to condemn U.S. economic restrictions on Cuba. “Mr. Waltz, this is the United Nations General Assembly,” Cuban Foreign Minister Bruno Rodriguez said, cutting off Waltz. “It is not a Signal chat. Nor is it the House of Representatives,” he added, also calling Waltz’s