Israel’s determination to attack Iran and the certainty that US troops would be targeted in response forced the Trump administration to take pre-emptive strikes, the secretary of state, Marco Rubio, said, in a new explanation for Washington’s surprise entry into the conflict. The rationale drew divided reviews from top members of Congress who on Monday evening received the first briefing by the Trump administration since it ordered the air campaign to begin over the weekend. Rubio; the CIA director, John Ratcliffe; and joint chiefs of staff, chair Dan Caine; spoke to the lawmakers behind closed doors in the Capitol ahead...