Santorum is on the attack, but Gingrich won’t back down

Rick Santorum wants Newt Gingrich out of the race so he can take on Mitt Romney one-on-one. Chris talks to Gingrich supporter Rick Tyler and Republican strategist Chip Saltsman.

Watch Hardball at 7 p.m. ET.

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More on msnbc today:

• Richard Lui talks with Democratic strategist Jimmy Williams and Republican strategist Danny Vargas earlier this afternoon on NewsNation about how the top three GOP candidates are faring as the race wears on
• Washington Post’s Nia Malika Henderson, Politico’s Joe Williams and the New York Times’ John Harwood talk with Martin Bashir about whether the Gingrich campaign may be over next week