U.S. Senator Ed Markey has won the Democratic endorsement in the Massachusetts U.S. Senate Race. 

At Saturday's Massachusetts's Democratic Party convention in Worcester, Markey cemented his role as the front-runner in the primary. 

The endorsement solidified Markey's support among party activists as Representative Seth Moulton challenges the 79-year-old incumbent.  Markey won 73-percent of the vote while Moulton got 27-percent of among the thousands of voting delegates. 

Moulton told reporters he was "proud of the support" he had in the room, but was "just aiming to get on the ballot."