Gas prices across metro Detroit blew past $4 a gallon this week. The federal data dropped Friday, and the numbers tell you exactly why: the U.S.-Israeli military campaign against Iran has cracked energy markets wide open, and Michigan drivers are absorbing the damage every time they pull up to a pump.
The Bureau of Labor Statistics put out its March inflation report Friday. Overall consumer prices climbed 0.9% in March compared to February. That’s three times the pace of the prior month’s increase. Year over year, prices across all categories are up 3.3%, the sharpest annual jump since May 2024.
Gasoline didn’t just contribute to that spike. It drove it. Gas prices rose 21.2% in March alone. Combined fuel oil and gasoline costs were up 10.9% month over month. Airfare climbed 2.7% as jet fuel tracked crude upward.
The Strait of Hormuz is the whole story
President Donald Trump launched a joint military campaign with Israel against Iran on Feb. 28. Iran’s response wasn’t a press conference. Iran effectively shut down the Strait of Hormuz, the narrow corridor connecting the Persian Gulf to open ocean. One-fifth of global petroleum supply moves through that chokepoint on a normal day. According to the International Energy Agency, Iran’s de facto control of the strait has produced the largest supply disruption in the history of the global oil market.
Before the war, a gallon of regular hadn’t cracked $3 all year in 2026. As of Friday, the national average sits at $4.15. Diesel is running $5.68 nationwide. Those aren’t abstract data points if you’re commuting from Warren to a job in Dearborn, or driving from Westland out to a plant that doesn’t offer anything close to public transit alternatives. Detroit’s transit infrastructure wasn’t built to absorb a fuel shock of this size. Every fill-up now costs somewhere between $15 and $30 more depending on your tank, and that math compounds across a month fast.
A ceasefire that hasn’t fixed the waterway
Governments signed a ceasefire agreement Tuesday evening. The strait didn’t notice.
Before the war, roughly 140 vessels transited the Strait of Hormuz daily. On Tuesday, ten tankers made it through. On Wednesday, one. The Joint Maritime Information Center, which tracks vessel location data globally, confirmed both figures. Iran’s operational control over the strait has continued past the ceasefire, and that means the supply disruption hasn’t eased. It’s still ongoing. Global oil markets don’t recover from a shock like this because two governments exchanged signatures. The physical infrastructure of petroleum logistics takes time to normalize even when the political conflict formally ends, and right now there’s no evidence the conflict has actually ended at sea.
Democrats aren’t letting Trump walk away from this
Democrats spent Friday trying to make sure the political cost of those pump prices doesn’t get diffused or forgotten.
Michigan’s own numbers matter here. Check the full breakdown at Michigan Advance, which has been tracking the state-level impact. Democratic National Committee Chair Ken Martin went directly at the president. He said Trump came into office promising to bring prices down and then did the opposite. “Instead he waged an unhinged trade war and started an unpopular war with Iran,” Martin said, calling the combination a direct hit on working people. He didn’t stop there. Martin said Trump’s trade and military decisions were “pushing working families to the brink.”
Martin’s full statement framed it as a trade: Americans were promised relief at the pump and in the grocery store, “and what have Americans gotten in return? Nothing except even higher prices.”
That’s the political argument Democrats will be pressing. Whether it lands depends on whether drivers keep connecting the pump price to the policy that caused it. In Detroit, where the car isn’t optional for most people and the 21% monthly surge in gas prices hit household budgets with no cushion, the connection isn’t hard to make.
Diesel at $5.68. Regular at $4.15. Ten tankers through the strait on Tuesday, one on Wednesday.
