Nine-term U.S. Rep. John Tierney has conceded defeat to former Marine Seth Moulton after a hard-fought Democratic primary in Massachusetts' 6th Congressional District.
Moulton is an Iraq war veteran from Salem. He will now face Republican Richard Tisei (tih-SAY') in the November election.
Moulton ran a well-financed campaign in his bid to unseat Tierney, suggesting the incumbent had been ineffective in Congress. Tierney launched a recent TV ad suggesting Moulton's campaign was being financed by people who support Republicans.
Moulton argued he would have a stronger chance of holding off Tisei, who lost to Tierney by less than 1 percent of the vote in the 2012 election.
Immigration attorney Marisa DeFranco and two other Democrats were also on the primary ballot Tuesday.
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