The gorilla in the room is the American Israeli Public Affairs Committee, which has been calling for new sanctions for months. Of the 16 Democrats who have endorsed the Kirk-Menendez legislation, several are up for re-election in closely contested states; Senator Kirk himself suggested Tuesday that a vote for new sanctions would be an opportunity for lawmakers to shore up support from the powerful lobby. “The great thing, since we represent a nationwide community — the pro-Israel community is going to be heavily present in most states — this is a chance for senators to go back and tell them, ‘I’m with you,’” Kirk said. Other Democrats pushing for the bill have close ties with the group, particularly Chuck Schumer and Cory Booker.
Tellingly, the Kirk-Menendez bill states that if Israel takes "military action in legitimate self-defense against Iran's nuclear weapons program,” the US "should stand with Israel and provide…diplomatic, military, and economic support to the Government of Israel in its defense of its territory, people, and existence." The language is nonbinding, but it raises flags about whose interests the legislation would truly serve.