FILE - In this March 30, 2012 file photo, then-Republican presidential candidate, former Pennsylvania Sen. Rick Santorum is joined by his wife Karen as he talks to reporters in Chippewa Falls, Wis. The Republican primary campaign is already fading into memory. Remember Herman Cain's 9-9-9 tax plan? Newt Gingrich's "moon base" proposal? Or Rick Perry's "oops" moment _ when he couldn't recall that third federal agency he wanted to eliminate? (AP Photo/Jae C. Hong, File)

Associated Press
FILE - In this March 30, 2012 file photo, then-Republican presidential candidate, former Pennsylvania Sen. Rick Santorum is joined by his wife Karen as he talks to reporters in Chippewa Falls, Wis. The Republican primary campaign is already fading into memory. Remember Herman Cain's 9-9-9 tax plan? Newt Gingrich's "moon base" proposal? Or Rick Perry's "oops" moment _ when he couldn't recall that third federal agency he wanted to eliminate?  (AP Photo/Jae C. Hong, File)
FILE - In this March 30, 2012 file photo, then-Republican presidential candidate, former Pennsylvania Sen. Rick Santorum is joined by his wife Karen as he talks to reporters in Chippewa Falls, Wis. The Republican primary campaign is already fading into memory. Remember Herman Cain's 9-9-9 tax plan? Newt Gingrich's "moon base" proposal? Or Rick Perry's "oops" moment _ when he couldn't recall that third federal agency he wanted to eliminate? (AP Photo/Jae C. Hong, File)
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