How a fringe idea about race took over the Supreme Court

This man fought a four-decade war against the Voting Rights Act. He has some help from a once-small faction within the Republican Party that took over the Supreme Court. | Chip Somodevilla/Getty Images Last June, in a case that effectively guaranteed one of Alabama’s Black Democratic members of Congress would be replaced by a white Republican, the Supreme Court used a single word that delighted movement conservatives and made many longtime civil rights advocates want to weep.  In the first…