“Trump stated that the US had 1.5 times the oil of all Opec countries combined. But at the end of 2014, the US had proven reserves of just under 40bn barrels, while Saudi Arabia alone had proven reserves of 268bn barrels.”
Note that America uses 7 billion barrels of oil a year, so that 40bn barrels reserve only equals about 6 years oil. Sure, it could be stretched out to last longer as they buy oil from other places and can use fracking to displace some, but that’s not what Trump promised. He promised total energy independence! Good luck with that mate!