US national average diesel prices surged to a record $6.5107/gallon on Monday, driven by geopolitical disruptions and supply chain strains. President Donald Trump has called for a ban on diesel exports to lower domestic costs, stating that strikes on Russian refining capacity are a serious hit to Russia and diesel prices.

Political Response to Supply Disruptions

Senate Majority Leader John Thune stated the US may explore banning diesel exports if supply permits, suggesting it "might be one way of getting" prices down. Former Congresswoman Marjorie Taylor Greene backed the Trump administration's plan on X, calling it an "America First" move.

Greene argued that home-produced fuel should be for Americans and "cheap," slamming oil companies for seeking "huge profits." She cited "absurd price gouging" for record highs and emphasized that working-class people are critical of the costs.

Analyst Warnings on Market Impact

GasBuddy analyst Patrick De Haan criticized the potential move, warning it would send a "chilling" signal to the market. He urged policymakers to exercise "extreme caution," noting that controls might chase away traders.

Responding to Greene, De Haan stated a ban would "not be good at all for long term investments in refineries." He argued that refinery expansions, not government control over sales, would strengthen America. He cautioned that refineries could simply shift production to jet fuel, leading to "more market madness."

Global Context and Price Forecasts

The call for caution comes as global supply chains face strain. Russia imposed a diesel export ban until September 30. Reports suggest President Donald Trump asked Ukrainian President Volodymyr Zelenskyy to halt strikes on Russian oil assets to prevent further disruptions.

De Haan projected that national average diesel prices could reach $7 in the coming days. He cited a noticeable jump in fuel costs within 48 hours, driven by the Iran war and the Russia-Ukraine conflict.

Geopolitical Risks Escalate

Tensions have intensified with reports that Yemen’s Iran-backed Houthis may have struck Saudi Arabia’s East-West pipeline. This infrastructure was built to bypass Strait of Hormuz disruptions during the 1980s. Trump reportedly declined a request from Saudi Crown Prince Mohammed bin Salman for military support against the Houthis.

Oil, Gas Movement

According to data from the American Automobile Association (AAA), the national average price of gasoline on Monday was $4.4786/gallon, while diesel hit the record high.

West Texas Intermediate (WTI) crude futures for November rose 1.41% to $93.67. Brent crude futures for November gained 1.68% to $102.03. Oil ETFs also reported growth, with the ProShares Ultra Bloomberg Crude Oil (UCO) ETF rising 1.88% to $52.70 and the United States Oil Fund (USO) gaining 1.59% to $150.51.

What the Numbers Show

The divergence between political intent and market mechanics is evident. While Thune and Greene view an export ban as a lever to reduce domestic costs, De Haan’s warning highlights the risk of exacerbating volatility. With prices already at a record $6.5107/gallon and forecasts pointing toward $7, any restriction on exports could tighten available supply further. The potential shift to jet fuel production suggests a ban might not lower diesel prices but could instead distort broader energy markets.

Economist Steve Hanke stated that record-high diesel prices are "crushing" American farmers and truckers during the harvest season. He argued on X that the fuel shock is a primary reason these groups are turning against President Donald Trump.

Diesel Surge Hits Farmers During Harvest

Hanke reported that farm fuel costs increased by $11 per acre for corn and $7 per acre for soybeans compared to last year. Reuters cited Purdue University economist Michael Langemeier to confirm these increases. The Energy Information Administration recorded U.S. on-highway diesel at $6.285 per gallon on September 14, a sharp rise from the previous year. Diesel crossed $6 nationally this month due to the U.S.-Iran conflict and Ukrainian attacks on Russian refineries tightening global supplies.

The timing has intensified financial pressure on agricultural operations. South Dakota farmer Drew Peterson expects to spend up to $1,500 a day fueling one combine, approximately twice last year’s cost. California vegetable grower Wayne Gularte reported a roughly 40% rise in his fuel costs.

Economists Warn Fuel Pressure Could Persist

Kansas State University economist Gregg Ibendahl warned that diesel prices could remain elevated for at least another year. He noted that farmers are price takers who must absorb higher costs without setting corn or soybean prices. American Farm Bureau economist Faith Parum stated farm diesel reached $5.45 a gallon on September 4, up from $3.02 a year earlier. University of Illinois economist Nick Paulson told Reuters that "$6-plus per gallon diesel" could create inflationary pressure on seed, fertilizer, and other inputs next year.

Truckers Struggle As Political Pressure Grows

Independent truckers face similar strain as they typically pay fuel bills upfront. DAT Freight & Analytics principal analyst Dean Croke told Reuters that further increases could trigger "diesel price-driven bankruptcies." While Hanke’s political claim suggests a broad shift, the Associated Press reported frustration among voters without establishing a widespread change in sentiment among farmers or truckers. Senator Chuck Grassley (R-Iowa) said high diesel prices are "killing farmers income" and urged an export embargo.

What the Numbers Show

The divergence between input cost inflation and revenue control is stark. While diesel prices more than doubled from $3.02 to over $6.28 per gallon, farmers remain price takers for their output commodities. This structural imbalance means the entire burden of the supply-side shock—driven by geopolitical conflicts—is absorbed directly by agricultural margins rather than being passed through to consumers.