Republican State Treasurer John Kennedy has advanced to a December runoff election for the Louisiana Senate seat being vacated by incumbent Republican David Vitter.Two Republican congressmen were among two dozen candidates vying for the Senate seat: Reps. Charles Boustany and John Fleming. White supremacist David Duke was also running but was not among the top-tier candidates in polling.Democrat Foster Campbell advances to December runoff election for Louisiana Senate seat.Copyright 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.