Steve Kornacki, Salon
At the very least, the Republican Party base's revolt against its own establishment cost the GOP a 50-50 Senate tie in 2010, with primary voters forcing unelectable nominees on the party in three races that it had otherwise been on course to win. A decent case can be made that the uprising actually cost Republicans outright Senate control.And now the same thing may be happening all over again, with Nebraska joining a growing list of unexpected 2012 Senate battlegrounds "“ at least for the moment.