The U.S. Department of Justice began an investigation into Mayor Brandon Johnson on Monday over allegations of race-based discrimination, citing his recent remarks at a Woodlawn church in which he emphasized how many Black people he’s hired in his administration. Johnson received a letter from Assistant Attorney General Harmeet Dhillon saying there is “reasonable cause” to believe the mayor “made hiring decisions solely on the basis of race,” in potential violation of the Civil Rights Act of 1964. The probe was the latest attack on Johnson, a freshman progressive mayor, from Republican President Donald Trump since he returned to the...