Corzine is expected to make an official announcement Friday. WCBS-TV in New York reports that New Jersey's other senator, Frank Lautenberg, has confirmed the choice.
Menendez was one of three Democratic congressmen who were reported to be on Corzine's short list. One, Rob Andrews, who represents a South Jersey district, has promised to run in next year's primary, the Bergen Record reported.
Menendez, the son of Cuban immigrants, grew up in the rough and tumble world of Hudson County politics. He served as mayor of Union City and became the first Hispanic state senator in New Jersey before running for Congress in 1992.