Black members of Congress are bracing for a crippling shakeup of their ranks after a Supreme Court ruling gutted a key section of the Voting Rights Act that had protected minority communities in political redistricting and helped boost their representation. Wednesday’s decision clears the way for Republican-led states to redraw U.S. House districts without regard to race, potentially creating many more GOP-friendly seats. Rep. Yvette Clarke, chair of the Congressional Black Caucus, told reporters that its members and Democrats would fight the effects of the ruling. “The Supreme Court has opened the door to a coordinated attack on Black voters across the country,” Clarke said. “This is an outright power grab.” Under Section 2 of the Voting Rights Act, voters could challenge electoral maps that appeared to dilute the ability of minority communities to elect representatives of their choosing.…