Senator Ed Markey wins Massachusetts Democratic primary

Incumbent, 80, beats back challenge from Seth Moulton, who argued Markey was too old to be effective at his job

Senator Ed Markey won the Democratic primary in Massachusetts on Tuesday, beating back a challenge from Seth Moulton, a congressman who tried to unseat him by arguing to voters his opponent was too old to be effective at his job.

Massachusetts is heavily Democratic, making the senator favored to win a third full term in the November general election, where he faces the Republican nominee John Deaton.