The Weekly Rundown: Iran Tanker Seizure, Heading Off Boris Johnson and Appraising U.S. Security Guarantees

A Union Flag waves outside the Houses of Parliament in London on July 12. Former British Foreign Secretary Boris Johnson is expected to become the United Kingdom's next prime minister. On July 18, British lawmakers approved a motion to stop the next prime minister from suspending Parliament to force through a no-deal Brexit, something Johnson has threatened to do.