Live updates: US-Iran war news; Oil prices climb as Iran signals Strait of Hormuz will stay closed cnn.comU.S. oil price hits $80 as doubt grows Washington and Tehran will reach Strait of Hormuz deal CNBCIran demands sanctions relief before reopening Strait of Hormuz qz.comIran Insists Strait Will Stay Closed Until U.S. Agrees to Demands nytimes.comIran's president says supreme leader urges 'unity' amid US sanctions, and other Mideast developments AP News