According to this site:
http://marcambinder.theatlantic.com/archives/2008/06/mccains_secret_service_code_na.php
McCain is Phoenix
Obama is Renegade
Michelle is Renaissance
Unknown what Mrs. McCain’s is, but probably begins with a P.
Wikipedia (http://en.wikipedia.org/wiki/Secret_Service_codenames) says Cindy is Parasol
Perky?
But the Obamas are bacon people according to his wife.
Double-smoked and Salted?
A play on his home state and a good one for any poor soul who survived years in the Hanoi Hilton.