Tennessee and its GOP owe soooooo much more to America than left trash like LAMAR!!!! and Corker. These jerks and all too many from other states like Illinois's Nancy Boy Kirk ARE the Democrat Margin of Victory. Take LAMAR's scalp in the 2014 primary as Swish Crist's scalp and Treasonweasel Lugar's and Big Dollar Dewhurst's and Old Fart Bennett's were taken in recent years.
The GOP-E have given Obozo two (TWO!!!) terms in the White House by issueless opposition and political pattycake. Drive each and every one of the bastards from public life. Make Tokyo Rove's issue free big Wall Street money campaigns the political equivalent of child molesting as the kiss of death to any candidacy.
Unfortunately, there is no on in the hopper at present that wants to run against Lamar!. He made sure to rack up all those endorsements to preclude any surprise challengers. We also have the serious problem of open primaries, so even if a credible challenger stepped up, the party establishment would try to recruit a 3rd opponent to take votes from said challenger and/or encourage Democrats to flood the primary to back Lamar! as the most liberal nominee.