HBO’s Bill Maher thinks the Department of Homeland Security has outlived its usefulness. On Friday’s episode of “Real Time,” Maher and his guests debated the DHS’s usefulness during a discussion of the debate between Kentucky Republican Sen. Rand Paul and New Jersey Republican Gov. Chris Christie. “There was a huge verbal slap by the Republican Party this week between Chris Christie, the governor of New Jersey, and Rand Paul,” Maher said. “And it was sort of I think a fight for the soul of the Republican Party — where they’re going to go because, OK, next month is the 12th...