John Tierney, a Democratic congressman in Massachusetts, will face Seth Moulton, the Boston Globe reports:

US Representative John F. Tierney, who narrowly won reelection against a Republican last year, will face a challenge in next year’s Democratic primary from a former Marine who served four tours in Iraq and plans to launch his campaign next week.

Seth Moulton, who said he came close last year to jumping into a three-way race against Tierney and Republican Richard Tisei, told the Globe he plans to wage a fresh-face campaign against the nine-term Salem Democrat, seeking to dislodge a member of the same party from a Massachusetts congressional seat for the first time in more than two decades.

“There are a lot of people in America who feel that it’s time for change in Congress, and that part of the solution is a new generation of leaders rising up to the challenge and serving,” Moulton said. “One of the things I learned in the Marines is that I really enjoy serving, and I miss that part of being in the Marines. So I’ve been looking over the past couple of years for an opportunity to serve the country again, and I think this is a place where I can make a difference.”

Tierney survived Tisei’s challenge, winning by 1 percentage point, despite criticism over his wife pleading guilty to helping her brother file false tax returns in connection with an illegal offshore sports gambling operation.

Moulton, a 34-year-old Marblehead native, holds three degrees from Harvard and, since leaving the Marines, has worked as managing director of a Texas rail company and now leads a North Shore start-up aimed at combating obesity.

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