Anyone ever consider Newt? He has the most to gain as Cain’s supporters would probably back him more than Romney. Besides, it mitigates the baggage everyone says Newt has.
As long as we’re guessing.
Newt is too establishment and the establishment appears to actually be defending Cain today. I don’t think Newt or Mitt or Rove is behind it. It was either Perry, Bachmann, or the democrats.