Rand Paul is the most interesting contender for the Republican nomination. And when I say interesting, I mean that in the broadest sense. A case in point: Last week, the Kentucky senator hit some turbulence when the Washington Free Beacon reported that Jack Hunter, Paul’s aide and the co-author of his book, The Tea Party Goes to Washington, was once the Southern Avenger. Who’s that? Starting in the 1990s, as a radio shock-jock, Hunter would wear a wrestling mask made from a Confederate flag, while making jokes about the assassination of Abraham Lincoln and having the South re-secede. “Although Lincoln’s...