Richard Mourdock, right, leaves a voting location Tuesday, May 8, 2012, in Avon, Ind. Mourdock is challenging Sen. Richard Lugar. The state has three open congressional seats in Tuesday’s primary, ... more 
Richard Mourdock, right, leaves a voting location Tuesday, May 8, 2012, in Avon, Ind. Mourdock is challenging Sen. Richard Lugar. The state has three open congressional seats in Tuesday’s primary, two of which have tea party-backed candidates. But it’s the movement’s challenge to Lugar by Mourdock that could rock the Republican establishment on its heels. (AP Photo/Darron Cummings) less 
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Associated Press | Photo By Darron Cummings
Tue, May 8, 2012 6:12 PM EDT