By Justin Sink
Louisiana Lt. Gov. won't challenge Landrieu for Senate
But despite Louisiana's Republican tilt, Landrieu has increased her margin of victory in each subsequent U.S. Senate election she has competed in. In 2008, she defeated state treasurer John Neely Kennedy 52-46 percent. Her bid next year will likely be aided by her brother, Mitch Landrieu, who became mayor of New Orleans in 2010.