A second Democratic senator says he's opposed to the Iran nuclear agreement.

New Jersey's Bob Menendez on Tuesday said in a speech in his home state that he opposes the deal which would curb Iran's nuclear program in exchange for relief from economic sanctions.

The senior member of the Senate Foreign Relations Committee joins Sen. Chuck Schumer of New York in rejecting the deal.

Menendez says that he is opposed to the measure because Iran has violated various U.N. Security Council resolutions while advancing its nuclear program.

He says that he is concerned that the agreement doesn't require Iran to dismantle its nuclear infrastructure.

He says it's not an issue of whether he supports or opposes President Barack Obama, who has pledged to veto a congressional resolution of disapproval.