A Democratic primary took place on Tuesday, resulting in a win for Sen. Ed Markey. He defeated challenger Rep. Seth Moulton, securing his party's nomination. The challenge was centered on age and generational change.

The primary was a generational showdown, with Markey fending off Moulton's bid. Details of the primary are available from the source, including the context of the campaign.

Further information about the primary and its outcome can be found through the source, providing more insight into the election and its significance.