Mike Waltz told lawmakers Tuesday at his confirmation hearing to be U.S. ambassador to the United Nations that he plans to make the world body “great again.” President Donald Trump's former national security adviser is appearing before the Senate Foreign Relations Committee for his confirmation hearing Tuesday. Waltz says “we should have one place in the world where everyone can talk" but said the U.N. has "drifted from its core mission of peacemaking.” The hearing is providing senators with the first opportunity to question the former Florida congressman over revelations he added a journalist to a private text chain on the unclassified Signal messaging app, which was used to discuss sensitive military plans.