The price of diesel fuel in the United States has reached an unprecedented record high of $5.85 per gallon, driven by the ongoing war with Iran. This new national average, recorded on Friday according to the American Automobile Association (AAA), surpasses the previous peak set in June 2022 following Russia's invasion of Ukraine.

The surge in diesel prices arrives at a critical juncture, just weeks before the November midterm elections. Diesel fuel is essential for powering heavy machinery, buses, trains, and large trucks, meaning the price hike is anticipated to increase costs for transporting and producing a wide array of goods, including groceries.

President Donald Trump's administration has repeatedly claimed control over the Strait of Hormuz, a vital global energy trade route. However, the escalating price of diesel suggests continued volatility in the region is impacting global oil markets, pushing crude oil prices into the $90 per barrel range.

The price of gasoline has also seen a significant rise, reaching $4.14 on Friday, a record high for this time of year ahead of the Labor Day holiday weekend. AAA noted that "Labor Day weekend travelers are facing the highest gas prices ever for this time of year."

Tehran's response to initial US and Israeli strikes in February involved shutting down the Strait of Hormuz, a move that immediately sent oil and gas prices soaring. Despite recent assertions from President Trump and Vice President JD Vance that Iranian control over the strait is "effectively gone," market indicators suggest otherwise.

Public opinion polls indicate that the war with Iran remains unpopular among US voters, and concerns over the cost of living have become a dominant electoral issue. The rising fuel prices add another layer of economic pressure on households and could influence voter sentiment in the upcoming congressional elections.

Before the Trump administration joined Israel in initiating the war on Iran, a gallon of gasoline was priced at less than $3. The current price levels represent a substantial increase for consumers and businesses alike, raising concerns about broader economic impacts and inflation.

As the midterm elections approach, the persistent rise in fuel costs and the ongoing conflict in the Middle East present significant challenges for the Trump administration, potentially affecting the Republican Party's efforts to maintain control of the Senate and House of Representatives.