To boil it all down into something funny,
Question: What should we do about anchor babies?
Cain: 9-9-9.
Perry: Drill for oil.
Santorum: Ban gay marriage.
LOL, funny! We should bear in mind that this is a question CNN and friends use as a weapon to get video clips to include in 2012 election TV ads to make hispanics vote against whoever is the GOP nominee (remember Sharron Angle). So maybe their evasion was the best tactic here.