Rick Santorum

FILE - In this April 13, 2012 file photo, Rick Santorum speaks in St. Louis. Santorum was one of Mitt Romney's toughest foes during the GOP presidential race, but the former Pennsylvania senator plans to help Romney appeal to the party's conservative base when he addresses the Republican National Convention.  (AP Photo/Michael Conroy, File)
2016 Republican Presidential Candidate, Former U.S. Senator representing Pennsylvania

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  • Study: Gingrich, Santorum Plans Would Hike Deficit Friday, 24 Feb 2012 | 4:09 PM ET
    GOP Candidates Newt Gingrich and Rick Santorum

    Massive tax cuts proposed by Newt Gingrich and Rick Santorum would cause the national debt to explode while Mitt Romney's budget plan could generate red ink in line with current projections, according to a new study.

  • Romney: Raise Medicare Eligibility Age Friday, 24 Feb 2012 | 3:34 PM ET
    Republican presidential candidate, Mitt Romney speaks to members of the Detroit Economic Club during a luncheon at Ford Field .

    Days before a pivotal primary, Mitt Romney says he would raise the eligibility age for Medicare as he looks to show he's willing to curtail government benefits in the long run.

  • It's All Economy, All the Time for Romney Friday, 24 Feb 2012 | 12:29 PM ET
    Mitt Romney speaks during a town hall meeting campaign stop at Eagle Manufacturing Corporation February 21, 2012 in Shelby Township, Michigan.

    It's all economy all the time for Mitt Romney, who's back to campaign basics as he tries to fend off Rick Santorum in Michigan and Arizona primaries on Tuesday.

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