Thad Cochran, R-Miss., has been in the U.S. Senate since 1979.
Thad Cochran, R-Miss., has been in the U.S. Senate since 1979. Rogelio V. Solis AP File
Thad Cochran, R-Miss., has been in the U.S. Senate since 1979. Rogelio V. Solis AP File