Did you see the Q/A with Rick Perry in the NY Times??

thecaucus.blogs.nytimes.com?

Q. Why did you choose to keep the birther issue alive?

A. It’s a good issue to keep alive. You know, Donald [Trump] has got to have some fun. It’s fun to poke him a little bit and say “Hey, let’s see your grades and your birth certificate.” I don’t have a clue about where the president — and what this birth certificate says. But it’s also a great distraction. I’m not distracted by it.

It’s one big joke to him. I think it’s un-American (and I don’t use that word often) to spread malicious rumors about a sitting President—whether you like him or not.