In what will long be considered one of the biggest upsets in North Shore political history, Marblehead businessman and former Marine Captain Seth Moulton defeated incumbent Congressman John Tierney in Tuesday’s Democratic primary in the 6th Congressional District.
Tierney, a 9-term Congressman, officially conceded the race a little after 9:15 p.m.
Moulton, 35, will face Republican Richard Tisei in November’s final election.
This was Moulton’s first run for office, and in the end, his message of change resonated with Democrats and independents across the 6th District. Moulton was also boosted by a fear among Democrats over recent polling data showing that Tierney would lose to Tisei by as many as 8 percentage points.
Meanwhile, those same polls showed Moulton beating Tisei by as many as 8 points.
Not only was this a bad night for a fallen Congressman, it also wasn’t a very good night for Tisei, who is now a very big underdog against Moulton.
Tierney is the first incumbent Democratic congressman from Massachusetts to lose a primary since Chester Atkins in 1992.
I’ll have more analysis in the coming days.
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