The biggest cause for the price increase. The rebound of our economy after the last admin shut it down.
His energy policies have no effect on prices. I would not say that is true in future years.
I don't agree that his policies had no effect. His rhetoric can easily have had an effect on investment and financing even before his inauguration. That said, the effect was probably small until about late summer and had been progressively larger since then.
I intentionally stepped over the garbage about who shut down the economy and will not engage about that.