My thoughts exactly... first Bachmann would be a disaster, then Perry, then Cain and now Newt. Truth is that Romney would be the biggest disaster. I could see any supporter of the mentioned vote for another name. I can't say that about Romney. If he gets the nod I believe many will not vote or go third party.
Actually third party may not be so bad. How about Trump/Palin; or Palin/Trump; or Palin/and the Jr. Senator from South Carolina.
I won't vote for Romney. I don't expect zero to be the Democrat nominee.