12/23/2010 03:50 pm ET Updated May 25, 2011

Mitch McConnell's Fortress Of GOP Unity Fractures As Iron Grip Slips

For two years, Senate Minority Leader Mitch McConnell (R-Ky.) maintained iron discipline over his 40-to-42-member conference, mustered a mostly united opposition against the White House -- and helped define the GOP as "the party of no" in the eyes of critics.

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