U.S. diesel prices are climbing amid supply disruptions linked by GasBuddy analyst Patrick De Haan to Ukrainian strikes on Russian oil and the closure of a major Middle East shipping route. De Haan said the national average had reached $6.301 a gallon, while gasoline stood at $4.355, and warned diesel could reach $6.60 within days and potentially $7 soon if recent trends continue. The Great Lakes states of Michigan, Indiana, Ohio and Illinois were identified as especially exposed, while Wisconsin was described as less affected because of lower taxes. AAA data put Tuesday's average prices at $4.3289 for gasoline and $6.2694 for diesel; California prices reached $6.0175 for gasoline and $8.2124 for diesel. De Haan said the market faced simultaneous supply constraints and peak summer demand. Trump said he had urged Ukrainian President Volodymyr Zelenskyy to stop attacks on Russian oil infrastructure, while directing strikes toward other targets.