Rep. Ilhan Omar, D-Minn., joined the chorus of voices celebrating former national security adviser John Bolton's departure from the White House. "John Bolton has been one of the leading proponents of making the world a more dangerous place," she tweeted on Tuesday. "Good riddance." Bolton, notoriously hawkish on foreign policy, was the former U.S. ambassador to the United Nations during former George W. Bush's incursion into Iraq. He has widely been criticized by people like Sen. Rand Paul, R-Ky., for pushing an aggressive foreign policy that resulted in long overseas wars.