Aamer Madhani.

Just hours before Israel launched strikes on Iran early Friday, President Donald Trump was still holding onto hope that the long-simmering dispute over Tehran’s nuclear program could be resolved without military action. But with the Israeli military operation now underway and likely to continue for some time, Trump will be tested anew on his ability to deliver on a campaign promise to disentangle the U.S. from foreign conflicts. He’s already struggling to find an endgame to the conflicts in Ukraine and Gaza.