Oil prices moved above $91 a barrel after former President Donald Trump cast doubt on the chances of a new agreement with Iran, reinforcing concerns that geopolitical friction could constrain future supply. Brent crude, which traded around $88.6 to $88.9 earlier in the day, reflected the shift in sentiment, while U.S. gasoline prices rose to $4.06 per gallon. The move fits a familiar market pattern in which perceived risks to supply push energy prices higher, and current pricing suggests a modest expectation that crude could reach a new all-time high by year-end. Traders are now watching for further signals from Iran, the United States, and OPEC on policy or production that could reshape the supply outlook, alongside demand trends and broader economic indicators.