U.S. Sen. Scott Brown, R-Mass., pumps his fist during his re-election campaign kick-off in Worcester, Mass., in this Jan. 19, 2012 file photo. If Sen. John Kerry is confirmed by the Senate for secretary of state, as expected, Kerry would have to resign the seat he&#39;s held for nearly three decades, prompting a special election _ the state&#39;s third Senate contest since 2010. Already, jockeying is well under way. The big question is whether Republican Sen. Scott Brown will go for the seat, after losing his last month to Democratic challenger Elizabeth Warren. (AP Photo/Charles Krupa, File)
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