CONCORD, N.H. (AP) - Republican Scott Brown has chosen New Hampshire's seacoast to officially kick off his campaign for the U.S. Senate.

After months of speculation, the former Massachusetts senator moved to New Hampshire in December, created an exploratory committee and spent the last few weeks traveling around the state meeting voters.

Brown won a special election in Massachusetts in 2010, then lost his seat to Democrat Elizabeth Warren in 2012.

Democrats have charged that he only moved to New Hampshire to run for Senate. Brown on Monday played up his childhood in Portsmouth, where he'll formally join the race on Thursday.

Hoping for a chance to unseat Democrat Jeanne Shaheen this fall, Brown faces former U.S. Sen. Bob Smith, former state Sen. Jim Rubens and conservative activist Karen Testerman in the GOP primary.

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