Sen. Pat Roberts, R-Kan., boards a shuttle to return to his Capitol Hill office following a procedural vote on a comprehensive defense bill, in Washington, Thursday, Dec. 19, 2013. A hard-right ... more 
Sen. Pat Roberts, R-Kan., boards a shuttle to return to his Capitol Hill office following a procedural vote on a comprehensive defense bill, in Washington, Thursday, Dec. 19, 2013. A hard-right conservative group led by former Kansas Congressman Jim Ryun is endorsing a Republican who is trying to oust three-term GOP Sen. Pat Roberts. (AP Photo/J. Scott Applewhite) less 
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Associated Press | Photo By J. Scott Applewhite
Thu, Dec 19, 2013 5:42 PM EST