Updated: Feb. 29, 2012 at 8:19 AM

Michigan and Arizona Republican primaries (14 images)

Mitt Romney was a double winner Tuesday, capturing the Michigan and Arizona Republican presidential primaries, results showed.

Republican presidential candidate Mitt Romney speaks to his supporters at a campaign rally at the Suburban Collection Showplace in Novi, Michigan on February 28, 2012 upon the results of the Michigan Republican Primary. UPI/Santa Fabio

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Buttons of Republican presidential hopeful Rick Santorum are displayed for sale at a primary election night rally on February 28, 2012 in Grand Rapids, Michigan. Both Michigan and Arizona held their primaries for the GOP presidential nomination on Tuesday. UPI/Brian Kersey

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