I don't think Mitt Romney and Newt Gingrich have helped themselves with their terse exchanges on illegal immigration and Fannie & Freddie.
Apparently, Rick Santorum didn't think so either. He said there was nothing wrong with Newt using his knowledge of Congress to help advise companies and then said there was nothing wrong with Romney making money. Santorum then implored Mitt and Newt, "Leave that alone and focus on the issues," to strong applause
I don't know if it will help Santorum any but it was his best single moment in any of his debates.