The repubs really do have a sad bunch.
I think it's because they know how tough it is to beat a sitting president. It's only happened once in the last 32 years - Bush 92 - when Perot stole 18% of the popular vote, mostly from Bush.
The people who could have won - Daniels, ODonnel, Ryan, Jeb, Christie, even Palin - they all chose to sit out in 2012. They knew obama would be tough to beat. Global betting still has obama over 50% on intrade. People worldwide belive he'll win.