Pro-Palestinian progressive insurgent Jamaal Bowman ousted House Foreign Affairs Committee Chairman Eliot Engel in the New York Democratic primary, according to an Associated Press call of the election today. While Engel has been trailing Bowman by a wide margin since the election was held last month, the counting of mail-in ballots has delayed the final results.

Why it matters: Engel, a 16-term incumbent, was a powerful ally of the American Israel Public Affairs Committee (AIPAC). While Bowman campaigned mostly on domestic issues, he also attacked Engel over his lengthy foreign policy record. Specifically, he criticized Engel’s vote for the 2002 Iraq war authorization, his opposition to President Barack Obama’s Iran nuclear deal and his 2016 vote to allow the sale of cluster bombs to Saudi Arabia, as well as the influx of cash his campaign received from defense contractors.

The race also became a high-dollar proxy war between AIPAC-aligned groups and Justice Democrats, a pro-Palestinian progressive organization that helped Alexandria Ocasio-Cortez unseat former House Democratic Caucus Chairman Joe Crowley in New York in 2018. The Justice Democrats group has called for ending US arms sales to Israel, Saudi Arabia and Egypt on human rights grounds.

What’s next: Republicans have not fielded a challenger in the solidly blue district, and Bowman is all but assured victory in the November general election. In the meantime, the race to replace Engel as Foreign Affairs Committee chairman on Capitol Hill is already unfolding. Reps. Brad Sherman, D-Calif., Gregory Meeks, D-N.Y., and Joaquin Castro, D-Texas, are all vying for the position.