Romney, Santorum Clash Over Conservative Values, Earmarks

(6:3)

Romney, Santorum Swap Charges in 20th Debate

(1:58)

Romney vs. Santorum at CPAC

(2:41)

Romney, Santorum Assail Each Other in GOP Debate

(2:18)

Rick Santorum on Mitt Romney

(1:3)

Santorum, Gingrich Pile on Romney 'Electability'

(3:19)

Rick Santorum on Mitt Romney's gaffe

(1:28)

Santorum Hits Romney Over Mass. Health Care Plan

(1:29)

With Romney, Santorum Ahead, Gingrich Eyes Brokered Convention

(11:19)

Romney, Santorum in Dead Heat for Mich. Primary

(2:22)

Santorum, Romney questioned over gay rights

(3:16)

US election: Mitt Romney attacks Rick Santorum over 'earmarks'

(3:14)

Rick Santorum addresses Mitt Romney

(1:22)

Romney, Santorum battle for Wisconsin

(2:33)

Romney jabs Santorum's debate performance

(1:35)

Primary Night Video: Santorum, Romney Differ On Health Care

(1:31)

Michigan Primary Results: Mitt Romney Narrowly Beats Rick Santorum, Regains Momentum

(2:7)

Romney: Santorum will have role in party

(1:1econd)

Rick Santorum adresses Mitt Romney

(1:22)