By Jonathan Allen (Reuters) – Several voting rights groups filed a lawsuit on Friday challenging Florida’s new congressional map, saying it unfairly diluted the voting power of Black residents to benefit Republicans. The new map is backed by Florida Governor Ron DeSantis, a Republican, who signed it into law on Friday. It passed the state Senate on Wednesday and the House of Representatives on Thursday after some Black lawmakers from the Democratic Party staged a sit-in protest during debate. With all but two other states finished with the once-a-decade redistricting process, the outcome in Fl…