https://www.city-journal.org/gas-prices-higher-in-democratic-leaning-states
The average price of one gallon of regular gasoline in the United States rose by a dollar, to $3.31, during Joe Biden’s first year in the White House. Now, supercharged by war in Ukraine, the price has soared to $4.27 per gallon. That average, though, is misleading. The actual price of gas at the pump varies widely by state, with nearly a $2-per-gallon difference between the costliest and the least expensive states. While some of those differences have to do with geographic factors that affect distribution costs, state policies—including taxes and regulations—also play a significant role in the vastly different burden consumers face around the country.
The highest gas prices are found disproportionately in high-tax, heavily regulated Democratic states, while the lowest gas prices show up in so-called red or purple states. California leads the way at a whopping $5.78 per gallon, followed by Nevada, Washington, Oregon, Arizona, Illinois, Connecticut, and New York among the lower 48 states (Hawaiian and Alaskan geography make any comparisons with the rest of the country difficult). At the bottom sits Kansas, at $3.81 per gallon, followed by Missouri, Oklahoma, Arkansas, Nebraska, North Dakota, and Iowa.
The price of a barrel of oil accounts for about 56 percent of the cost of this gas. Taxes on average compose about 15 percent of the price, and distribution and marketing costs amount to the rest. State gas taxes are an obvious culprit, but extraordinary fuel standards beyond the national level force up prices, too—as do regulatory constraints on building pipelines and refineries, which inflate distribution costs.