Iraq veteran Seth Moulton defeated GOP candidate Richard Tisei.
Menino was Boston's longest serving mayor, winning five terms.
Her endorsement comes with Dem Seth Moulton up 8 points over Republican Richard Tisei.
Clinton leads Warren by 38 points among the state's likely Democratic voters.
Martin Walsh (D) was sworn in Monday as Boston’s new mayor.
Markey was seeking a full, six-year term after winning a special election last year.
The issue adds another complication to the Republican's efforts in New Hampshire.
Patrick said "a lot of people" had asked him to think about a run.
From today's "Post Politics" column in The Washington Post: "A new poll shows former secretary of...
The former Massachusetts senator was mum on his plans for a run in New Hampshire.