Rick Santorum

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**FILE** Republican presidential candidate and former Pennsylvania Sen. Rick Santorum (right) stands below the Paul Bunyan and Babe the Blue Ox statues with Bill Batchhelder during a campaign stop in Bemidji, Minn., on Feb. 5, 2012. Bachhelder's company, Bemidji Woolen Mills, manufactures the official "Santorum for President" sweater vest. (Associated Press)

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** FILE ** Former Republican presidential candidate Rick Santorum. (Associated Press)

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Rick Santorum

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Former Sen. Rick Santorum, R-Pa., speaks during the leadership forum at the National Rifle Association's annual convention Friday, May 3, 2013 in Houston. (AP Photo/Steve Ueckert)

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Former U.S. Senator Rick Santorum addresses the Republican National Convention at the Tampa Bay Times Forum in Tampa, Fla. on Tuesday, August 28, 2012. (Rod Lamkey, Jr./ The Washington Times)

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Former Sen. Rick Santorum of Pennsylvania, one of the social conservatives who sought the GOP nomination but eventually dropped out, says his role at the convention this week is to “amplify” Mr. Romney’s campaign, not to add to it. (Andrew Harnik/The Washington Times)

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Former Sen. Rick Santorum speaks at a "treasure life" event sponsored by the Republican National Coalition for Life at the Republican National Convention in Tampa, Fla., on Tuesday, Aug. 28, 2012. (Andrew Harnik/The Washington Times)

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Former presidential candidate Sen. Rick Santorum attends a "treasure life" event as part of the Republican National Coalition for Life and Republican National Convention, Tampa, Fla., Tuesday, August 28, 2012. (Andrew Harnik/The Washington Times)

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Former presidential candidates Sen. Rick Santorum, Rep. Michele Bachmann and Gov. Rick Perry speak at a "treasure life" event as part of the Republican National Coalition for Life and Republican National Convention, Tampa, Fla., Tuesday, August 28, 2012. (Andrew Harnik/The Washington Times)

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Former presidential candidate Sen. Rick Santorum leaves after speaking at a "treasure life" event as part of the Republican National Coalition for Life and Republican National Convention, Tampa, Fla., Tuesday, August 28, 2012. (Andrew Harnik/The Washington Times)