About 10% of the USA's imported oil comes from Saudi Arabia.[0] That would leave a pretty sizable hole in the supply.
[0]: https://en.wikipedia.org/wiki/Petroleum_in_the_United_States...
[0]: https://en.wikipedia.org/wiki/Petroleum_in_the_United_States...
A side-effect of ending our persecution of Iran, however, is that Putin would likely start a war. If Iran were allowed to dump their vast natural gas supplies on the open market, Russia's economy would starve.
(Edited for formatting / spelling / grammar).
No, he wouldn't. Russian establishment has no balls for that, Russian regime was already in survival mode by the end of Putin's first presidency. All they want now is to be left alone with their puny savings from days of abundance, and to die before their money run out.
Their expansionist ambitions? A bluff, a diversionary manoeuvre - plainly and simple.