WASHINGTON (Reuters) - President Donald Trump hit out at a prominent African-American critic on Saturday, calling him a “brutal bully” who should concentrate on cleaning up his “disgusting, rat and rodent infested” Baltimore district rather than criticizing the work of U.S. immigration officers on the Mexican border. FILE PHOTO: U.S. President Donald Trump speaks to the news media in the Oval Office of the White House in Washington, U.S., July 26, 2019.