President Donald Trump has pushed to bring the war with Iran to a speedy end: He stepped up bombing raids. He threatened to wipe out infrastructure. He has attempted diplomacy and ordered a naval blockade. But Tehran is in no rush to cut a deal. Despite the assassinations of its leaders and the damage to an array of military sites, Iran’s regime seems to have benefitted politically from the attacks started by the U.S. and Israel, according to a Western diplomat with knowledge of the conflict and five Western officials, all with knowledge of intelligence assessments on Iran. The regime...