Vance says oil traffic through Strait of Hormuz has returned to pre-war levels US Vice President JD Vance says oil traffic through the Strait of Hormuz has "reached its pre-war height". "The Strait is open in the sense that we're seeing more oil come out," Vance said. "Some days there's actually more oil coming out of the Strait than before the war even started, so there's this element that the world economy is coming back into gear.