Highly unlikely. Trump is great at talking, bad at actually meaning anything. Acting tough is all his supporters wanna hear; because everytime we go to war, America loses their appetite real quick when Billy, Bob, and Joe Applepie down the block come back home in a casket.
Also, the world would not support threatening a large chunk of the world's oil supply, as Iran has nothing to lose. It also doesn't help that Trump is the type to push for exoneration of war criminals. A little something the Iranians will keep in mind…
Not to mention all the potential fifth columns or homegrown Ayatolla-sympathizers. All it takes is a pistol or a rifle, as Americans aren't as accepting of death as other countries are.