A baby-faced politician was named the mayor of a blue-collar township in New Jersey just one week after the two-term incumbent botched the response to a 14-alarm fire that forced a mass evacuation .

Frank Vélez, 24, who faced criticism for still living at home with his parents, crushed outgoing Belleville Mayor Michael Melham in the Tuesday night election.

Vélez, a councilman in the township and former staff assistant to late New Jersey Rep. Bill Pascrell, notched a 1,000-vote lead, spelling the end of Melham’s eight-year tenure.

Frank Vélez, 24, won the mayoral election in Belleville, New Jersey, on Tuesday. The Township of Belleville

A mattress factory fire devastated Belleville on May 3.…