Americans have been trending in a more isolationist, anti-war direction. Particularly on the right, the ascendant view is that the world’s problems are not necessarily ours.

As of Monday, however, Trump has adopted a notably more ominous tone. Shortly before his abrupt exit from the G7 meeting being held in Canada, he called on residents of Tehran, home to nearly 10 million people, to immediately evacuate, and later met with top national security officials at the White House Situation Room.

Mr Trump is drawn to success and Israel has momentum: the IAEA, a nuclear watchdog, has just confirmed damage to underground enrichment halls at Natanz, a nuclear site. The rate of Iranian strikes on Israel is falling.