Rick Santorum
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Santorum hat-trick in Minnesota, Colorado and Missouri

US presidential hopeful Rick Santorum has won the contests for the Republican Party nomination in Minnesota, Missouri, and Colorado.

Correspondents say Tuesday's hat-trick is a big upset for front-runner Mitt Romney, who has struggled to connect with the party's conservative base.

The eventual nominee will face Barack Obama in November's election.

Adam Brookes reports.

  • 08 Feb 2012
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