After President Trump halted retaliatory air strikes against Iran after Iran downed an American surveillance drone in June 2019, King said he agreed with the decision not to carry out the strikes but expressed concern about Trump's potentially limited options after steps taken by National Security Advisor John Bolton and Secretary of State Mike Pompeo. King also questioned the difference in U.S. relations with Iran that year as opposed to any other in the country's history and asserted that it was "a high-stakes gamble" if the U.S.'s pressure on Iran was unsuccessful.