"I think you know," Mitt Romney says. The question: Who did he vote for?

Romney has just cast his ballot in the presidential election.

His wife, Ann, was at his side when the pair cast their ballots near their Belmont, Mass. home a little before 9 a.m. EST. The Republican presidential candidate returns to Boston Tuesday night for an Election Day reception at the Boston Convention Center.

— Steve Peoples — Twitter http://twitter.com/sppeoples

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EDITOR'S NOTE — Election Watch shows you Election Day 2012 through the eyes of Associated Press journalists. Follow them on Twitter where available with the handles listed after each item.