Democratic primaries have also taken place in several other states
Sen. Ed Markey won the Democratic primary on Tuesday, ahead of Massachusetts Rep. Joe Kennedy III.
Kennedy, 39, tried to prove that 74-year-old Markey, who had long served in Congress, was disconnected from modern realities. At a late stage of the campaign, Kennedy was endorsed by House Speaker Nancy Pelosi.
But Markey is very popular in Massachusetts, and his candidacy has been supported by prominent members of the Democratic progressive wing, such as Senator Elizabeth Warren and Congresswoman Alexandria Ocasio-Cortez.
In the run-up to November’s general election, Markey is considered the front-runner. His rival will be Republican Kevin O’Connor.
Several other sitting Democratic congressmen won Tuesday’s primaries.
House Budget Committee Chairman Richard Neal outperformed Holyoake Mayor Alex Morse and will start a new term in January because he has no rivals in the November election.
In the 6th Congressional District, Congressman Seth Moulton, who briefly entered the presidential race, defeated two rivals.
In the 8th Arrondissement, incumbent Congressman Stephen Lynch defeated infectious disease expert Robbie Goldstein.