NASHUA, N.H. (AP) — In a move cheered by Republicans nationwide, former Massachusetts U.S. Sen. Scott Brown on Friday declared he wants to "stop complaining and get involved again" by formally joining the race against Democratic U.S. Sen. Jeanne Shaheen.
The longtime Massachusetts resident, who recently moved into his seacoast New Hampshire vacation home, launched an exploratory committee to enter the Senate race during a Republican conference in Nashua, ending months of speculation about his intentions.
While Brown has yet to file formal candidacy papers, his decision all but assures the GOP will have a top-tier contender who, win or lose come November, helps his party's national push to claim the Senate majority — a shift that could fundamentally reshape the final two years of President Barack Obama's presidency.
Underscoring the significance of Brown's move, the Washington-based Republican ally American Crossroads immediately announced plans to invest $650,000 in a television advertising campaign against Shaheen beginning next week. Strategists on both sides are warning that the contest could quickly become the most expensive in state history.
Brown, facing a packed hotel ballroom Friday evening, said his wife told him he should run for the U.S. Senate in New Hampshire if he really wants to make a difference.
"Honey, you are right," he said just before the crowd gave him a standing ovation. "I'm going to stop complaining and get involved again."
Recent polls give Shaheen a solid lead in a prospective matchup, but Brown's near-universal name recognition in a Massachusetts border state and his national fundraising network makes him a serious contender on Day 1.
Brown rose to national prominence by winning the 2010 special election to replace the late Massachusetts Democratic U.S. Sen. Ted Kennedy but was soundly defeated in his first re-election test against Democrat Elizabeth Warren in 2012. His first race, like this year's New Hampshire contest, hinged on the popularity of Obama's health care overhaul.
Brown declined to enter a 2013 special U.S. Senate election in Massachusetts, citing the strains of running a third Senate campaign in less than four years and partisan gridlock in Washington.
"I'm tired of the blaming," Brown said Friday as he talked up his New Hampshire connections. "I'm tired of the divisiveness."
Earlier in the day, Fox News Channel formally cut ties with Brown, who had recently renewed a contract to serve as a paid political contributor. Fox and other networks regularly feature former politicians but don't continue paid relationships once they become candidates.