** FILE **  Former Montana Gov. Brian Schweitzer, shown here in Helena, Mont., August, 2012, says he will not run for Montana's open U.S. Senate seat in 2014. (AP Photo/Matt Gouras, File)

** FILE ** Former Montana Gov. Brian Schweitzer, shown here in Helena, Mont., August, 2012, says he will not run for Montana's open U.S. Senate seat in 2014. (AP Photo/Matt Gouras, File)