The Republican primary calendar resumes this week with contests in Wisconsin, Maryland and the District of Columbia, all of which former Massachusetts governor Mitt Romney is expected to win.

While Rick Santorum and Newt Gingrich have aknowledged Romney currently has the advantage, both reiterated Sunday that they will stay in the race until a candidate reaches 1,144 delegates — the necessary threshold to win the Republican presidential nomination.

Santorum cited the Democratic nomination fight in 2008 and Mike Huckabee’s Republican presidential bid in 2008 to push back against the narrative that the former U.S. senator from Pennsylvania is hurting the party.

“Four years ago, everyone said, ‘Oh, we got to wrap this thing up’ and we did, and John McCain was the nominee and Barack Obama and Hillary Clinton went in the summer and pounded it out,” Santorum said on “Fox News Sunday.”

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