All eyes on KY, AR and PA

Yes, that's right, today is a test. In a couple of states today, most notably Pennsylvania, the nation will see the anti-incumbent feeling put to the test. Senator Arlen Specter and challenger Joe Sestak have locked in a polling dead heat for more than 4 weeks now and today it comes down to this. There are also primary elections in Arkansas and Kentucky. Arkansas Senator Blanche Lincoln is facing a tough primary battle and Kentucky Republicans are clashing over Senator Jim Bunning's seat, because he is retiring.