U.S. Senator Rand Paul has endorsed Republican Andy Barr in the Sixth District congressional race.Paul announced the endorsement Monday after a chamber of commerce luncheon in Winchester. Barr is challenging Democratic U.S. Rep Ben Chandler in the Nov. 6 general election. It is the Lexington attorney's second time running against Chandler. Barr lost to Chandler in a squeaker two years ago.Paul says he supports Barr because he is willing to cut spending.