U.S. Sen. Ed Markey, D-Mass., fended off a primary challenge on Tuesday from Rep. Joe Kennedy, D-Mass., for a second full term in the Senate. Although both ran as progressives, young climate change activists helped fuel Markey’s victory.

U.S. Sen. Ed Markey, D-Mass., left, is flanked by supporters as he addresses members of the media during a campaign stop, Tuesday, Sept. 1, 2020, in Boston. Markey, 73, is running in the primary against U.S. Rep. Joe Kennedy, D-Mass., for a second full term in the Senate. (AP Photo/Steven Senne)