Americans are tired of the costs of the Iran war hitting their pocket books - mainly thru gas, but also diesel, food (fertiliser) technology (helium) , interest rates etc.
The US govt has the ability to borrow infinite amounts of money in USD. Trump could simply subsidise gas/diesel to pre-war levels.
After the war, when oil drops ‘like a stone’ to ‘levels never seen before’, Trump could increase taxes to maintain the pre-war price and repay the debt.
The first small step towards subsidisation is obviously to remove all consumption taxes on gas/diesel.
If he is unwilling to take this approach why does he ask Americans to?