It depends on what "win" means. The US can win the opening military phase pretty decisively. The part that keeps failing is turning that into a political end state that can survive after the shooting slows down.
https://www.upi.com/Top_News/World-News/2026/07/18/iran-ayat...
Consider that, since that time (46 years), much of Iran's income has been directed to preparation for surviving nuclear war with the USA. Ergo underground living and production facilities, similar to those that the Soviet Union has constructed in Russia:
https://www.bing.com/search?q=how%20many%20soviet%20%20under...
have been built and occupied in Iran.
Defeating such an entrenched enemy requires conquering surface forces, then denying each bunker access to the surface and bunker-by-bunker surrender, asphyxiation or destruction. This requires boots on the ground and/or automation beyond the current SOA.
The alternative is to allow Iran to possess nuclear weapons.
Or PCP! HARR!
Can they? Iran seems to have destroyed them pretty decisively, after the literal first day of casualties (which were happening while Iran thought it had just reached an agreement that would prevent a war, per the Omani negotiators at that time).