Santorum campaign selling sweater-vests

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Santorum has received attention for the vests, which have become his sartorial trademark. In an interview on the Laura Ingraham show, the former Pennsylvania senator described how his sweater-vests caught on as a sort of symbol for his campaign.

"I was at a speech two weeks ago and I just happened to wear a sweater-vest that day," Santorum told Ingraham last week. "That speech went over very, very well. If there was one event that really began the moment, it was that speech. And I think most people recognized that here, so all the sudden the sweater-vest was like, 'Fear the vest.' "

Democrats have also associated the vests with Santorum. Rep. Chris Murphy (D-Conn.) promised to wear his sweater-vest if Santorum won the Iowa caucus.

"If Santorum wins tonight, I am overruling my staff's orders and breaking back out my sweater-vests. #argylerules," Murphy tweeted last week.