U.S. intelligence officials are warning that Iran has intensified efforts to assassinate Americans overseas, prompting the Trump administration to reduce diplomatic staffing across the Middle East amid escalating threats from Tehran and its terrorist proxies. Director of National Intelligence Jay Clayton issued an unclassified memo Friday to Secretary of State Marco Rubio, warning that Iranian assassination plots targeting U.S. citizens have reached dangerous levels. “Lethal plotting efforts by the Iranians against U.S. citizens have reached advanced stages,” Clayton wrote. Clayton said Tehran has significantly expanded operations targeting American personnel abroad and warned that the danger extends beyond individuals currently authorized...