I refuse to believe the US is gonna nuke Iran. Even for this unhinged admin, this is a whole lot of steps too far.
I don't think it's in the plans now. But if Iran continues to function and continues to bomb the Gulf after the US/Isreal begin heavily focusing on power plants, energy sites and civilian infrastructure (which so far everything points to Iran being able to do it), I wouldn't be shocked if we start reading reports or even Trump himself start talking about tactical nukes.
"They are very stubborn people. They are hiding in the mountains while their people die. It's a shame. We might have to nuke them to teach them the lesson they are asking for"...or some wild narrative like that.
Kinda like what happened to Japan after the US bombed Tokio to dust. killed hundreds of thousands with firebombings, took a ton of islands and there were no sings of total surrender.