Presidential wrestling names (aka "And now for something completely different...")

[muscadine]

This morning I was trying to come up with wrestling nicknames for each of the top remaining presidential possibilities (don't ask).

I think the best one is:
John "[the] Freight Train" McCain. This fits well with his signature move, "The Straight Talk Express."

I also like:
Hillary "the Hun" Clinton. I don't have a signature move for her yet. Maybe "The Nutcracker Suite."

I'm having the most trouble with the last one. Maybe:
Barack "the Rock" Obama - but that's already taken. Or perhaps...
Barack "Yer Momma" Obama.

Any ideas? What do you think their nicknames should be?