Photo by: Susan Walsh President Donald Trump center, posthumous pardons Jack Johnson, boxing's first black heavyweight champion, during an event in the Oval Office of the White House in Washington, Thursday, May 24, 2018. Trump is joined by, from left, Linda Haywood, who is Johnson's great-great niece, heavyweight champion Deontay Wilder, Keith Frankel, Sylvester Stallone, former heavyweight champion Lennox Lewis, and World Boxing Council President Mauricio Sulaiman Saldivar. (AP Photo/Susan Walsh)