Herman Cain said he would be comfortable running as VP with any of the GOP candidates... except Rick Perry.

And it's not because he thinks that word — that painted-on-a-rock name — might somehow get aimed at him:

Cain said his concerns about Perry include "being soft on the border, issues relative to tuition for children of illegal aliens." As governor, Perry supported legislation offering in-state college tuition for the children of illegal immigrants, which has become a flash point in the campaign. "And I haven’t totally gone through all of his positions, but a lot of positions I have questions with," Cain said.