On foreign policy, Booker supports scaling down U.S. involvement in Afghanistan and opposes intervention in Syria. After the US strike on Syria in April 2017, he criticized military action "without a clear plan" or authorization from Congress. He supports a two-state solution to the Israeli–Palestinian conflict. Booker has stated that Iran poses a direct threat to American and Israeli security and feels all options should be on the table for dealing with the conflict, but his decision to back the Iran nuclear deal framework damaged his long-term relationship with some Jewish voters and supporters. In an attempt to reduce the damage, he initiated an emergency summit for Jewish leaders, which some of his longstanding supporters did not attend.