Scott Brown not seeking Kerry's seat

Brown released a statement Friday afternoon making his decision official.

"I was not at all certain that a third Senate campaign in less than four years, and the prospect of returning to a Congress even more partisan than the one I left, was really the best way for me to continue in public service at this time," he said. "And I know it's not the only way for me to advance the ideals and causes that matter most to me."