JACKSON, Miss. — U.S. Rep John Lewis announced Thursday that he won't speak at the opening of Mississippi civil rights and history museums, saying it's an "insult" that President Donald Trump will attend.The long-planned Saturday ceremony will mark Mississippi's bicentennial of admission into the union. But what was intended as a moment of racial unity and atonement in the state with the largest share of African-Americans is descending into racial and partisan strife after [...]