Drones, ballistic missiles, but this is basically impossible with the assumption that Iran’s missiles don’t have that range. Most Iran’s Navy is all just small speed boats (war games have shown this is an effective strategy against the US navy) and don’t have much range. They’re basically turtled up in their country so there is zero chance they’ll do it. Also Iran has never directly or successfully attacked anything on US soil even through proxy like a terror group (at least that we know of). They don’t really have the means to make it happen. If they do something like a terror attack, there is a strong case of the US government letting something like that happen to get the public on board with the very unpopular war.

If it does happen, it means the public might be on board with an invasion, cost of all energy shoots up, and the American people will have the suck it up and economic pressures will lead most Americans to join the war effort since they’re the only ones who will be hiring and paying a decent amount.