He won by a seven-point margin, with more than 50 percent of his native Somerville turning out in his favor.
The representative-elect is a graduate of Dartmouth College. He received a law degree from Boston College Law School.
The mayor of Somerville for more than nine years, before that, Capuano served the city as an alderman.
Schinella is a free-lance writer who champions his more than 15 years of local political activism. Hyde and he remained in close contact throughout the campaign.
Morell, a railroad worker and union organizer, ran as a socialist, hoping to capitalize on Cambridge's alleged political radicalism.
Such diversity works for the 8th. The district is one of the state's most diverse. Its fabric includes poorer sections of Boston and Cantabrigian mansions. Capuano's primary win reflects his success in transforming his city into a haven for young professionals.
There was at least one sign last night that Capuano's pledge to always tell the whole truth may cause him trouble in Washington.
After exhorting supporters to "whack me on the back of the head" if "I forget who I am," a man in the crowd exhorted Capuano's wife, Barbara, to do so.
"She whacks me a little lower," Capuano said, as nervous laughter rippled through the crowd.