The reasons are two-fold, Herman Cain claimed at a Washington Times editorial board meeting.
First, there's RomneyCare; second, there's Mormonism.
"He would be a good choice, but I don't believe he can win for the following reasons.
One, he ran before. He has an ankle bracelet on called RomneyCare. Secondly, I know the south and you have to win the south. Mitt Romney didn't win the south when he ran. John McCain won the south; Mike Huckabee won the south. And I think that the reason that he will have a difficult time winning the south is because when he ran the first time, he did not do a good job of communicating his religion. Unfortunately, it doesn't bother me, but I do know that it's an issue with a lot of southerners.
You don't win South Carolina, Florida, and Georgia, you can't win the nomination, and then you can't win the presidency.
I like Mitt. I supported Mitt Romney in the last presidential election, but he didn't get the nomination.... so I don't think that he is going to be any stronger this time around Barack Obama, even though Barack Obama has a terrible record. Terrible."
[Hat tip: TPM DC]