FILE - In this Dec. 31, 2012 file photo, Sen. Susan Collins, R-Maine, speaks during a news conference on Capitol Hill in Washington as Sen. Joseph Lieberman, I-Conn., listens. As the Grand Old Party ... more 
FILE - In this Dec. 31, 2012 file photo, Sen. Susan Collins, R-Maine, speaks during a news conference on Capitol Hill in Washington as Sen. Joseph Lieberman, I-Conn., listens. As the Grand Old Party shifted right in recent years, Collins walked a delicate balance on explosive issues while her colleagues lost, retired or left the party altogether. (AP Photo/Susan Walsh, File) less 
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Associated Press | Photo By Susan Walsh, File
Wed, Apr 3, 2013 3:12 AM EDT