05/17/2010 10:24 am ET Updated May 25, 2011

Democrats And Republicans Could Both Face Major Primary Backlash

The proposition that the Tea Party could tear apart the GOP will be tested in primaries this week -- nowhere more so than in Kentucky, where Tea Party darling Rand Paul looks set to knock out Senate minority leader Mitch McConnell's chosen heir, Kentucky secretary of state Trey Grayson. But the real story of this week's primaries and special elections may be the Democrats' intraparty war, as groups impatient -- or disillusioned -- with the Obama Administration take aim at incumbents.

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