Justice Stephen G. Breyer says the Supreme Court must promote the political rights of minorities and look beyond the Constitution's text when necessary to ensure that "no one gets too powerful." Breyer, a Clinton appointee who has brokered many of the high court's 5-4 rulings, spoke in a televised interview that aired one day before justices hear a key case on race in schools. He said judges must consider the practical impact of a decision to ensure democratic participation. "We're the boundary patrol," Breyer said, reiterating themes in his 2005 book that argue in favor of race preferences in university...