New Jersey's Democratic U.S. senators Cory Booker and Bob Menendez have endorsed Phil Murphy for governor.

The lawmakers on Monday threw their support behind Murphy, a Democrat running to succeed Republican Gov. Chris Christie whose second term ends in 2018.

The former Goldman Sachs executive and Obama administration ambassador to Germany has relatively quickly consolidated Democratic support for his candidacy.

He has competition in the June primary from Assemblyman John Wisniewski and state Sen. Ray Lesniak, among others.

But Murphy has gained backing from significant labor unions and county party chairmen.

Booker was elected to his first full term in 2014. Menendez has represented New Jersey in Congress since 1993, first in the House and in the Senate since 2006.