Rick Santorum: Who Is Rick Santorum?

His announcement follows a letter yesterday by Republican presidential candidates Michele Bachmann, Newt Gingrich, Jon Huntsman and Rick Santorum saying they will join Texas Governor Rick Perry in his lawsuit seeking to be placed on the March 6 primaryRick Santorum is getting increasing attention as polls are showing for the first time that he could finish strongly here and have a big impact on the GOP race, CBS News political correspondent Jan Crawford reports. In the Hawkeye State, Santorum

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