Just saw some Trump supporters in YouTube comments saying that invading Iran is, like, super easy, you guys... in a video explaining that Iran is pretty damn hard to invade. It is mostly mountains, meaning anybody would have a hard time getting there in the first place, and is pretty much a military power. So, you can't just go there and destroy its nuclear installations unless you want a long, protracted war against a battle-hardened enemy.

So, if Trump did put Iran "on notice", and goes through with whatever that means, it won't be pretty.