Louisiana Gov. Bobby Jindal is taking a backseat on the stages where Republican Party stars campaign for Bill Cassidy. Potential GOP presidential candidates U.S. Sens. Rand Paul, of Kentucky, and Marco Rubio, of Florida, along with Texas Gov. Rick Perry and tea party favorite Dr. Ben Carson, of Maryland, have all come to Louisiana to rally voters to U.S. Rep. Cassidy’s effort to unseat incumbent Democratic U.S. Sen. Mary Landrieu in the Dec. 6 runoff.