Would Iran be able to attack the continental United States?
Absolutely not. And why would they want to? They have a variety of surface to surface missiles which operate geometrically. x in fuel plus y in angle means it lands on z target. Some of them don’t even have warheads, they are basically rocket powered bricks. They launch a battery of those and the Saudi ports and oil infrastructure is gone. Those bricks will punch any anti-missile system out of the sky. The war will be lost by the US in the morning. Hell, the US ran a bunch of war games mapping out invading Iran and even after they rigged it completely they still lost 20,000 casualties in a single day. Okinawa took months to do that.
EDIT: I saw what this was moved too and A) the whole point of having Nuclear weapons is to not use them and B) Iran doesn’t have a nuclear weapons program they canceled it in 2002. They have an Energy program but no bombs.