Krugman has a cryptic post about a security briefing that left him depressed. My guess is that Trump's latest movements bringing Marines and the 82 Airborne "online" has people more or less assuming that we will commit ground troops at some point. We know that Trump's war and his deployment of ICE to airports is not popular, but with the latter, how much of that is simply disgust with Trump personally? What could Trump do that would make 55% of the country approve of his actions (besides resigning and fleeing the country).?
Trump seems to realize that he's shitting the bed in Iran or at least that the oil markets are giving him feedback that he knows will be painful for him politically. What's also clear is that Iran understands this, too. Trump can ask for a ceasefire or a peace plan, but Iran has no incentive right now to give him anything. In fact, Iran has denied any talks with the US and has only engaged - it seems - with other regional powers. We have reports that Saudi Arabia wants to keep the war going and is basically on the same page with Israel in that regards, but other Gulf states may want an off ramp and might be willing to negotiate separate deals with Iran.
Right now, Iran's chokehold is on the Straits of Hormuz. That is going to be painful for months maybe years even after it opens. It's not a faucet that you simply turn on and off. At some point, I would expect some sort of terrorist attack on a military or political target in the US. Iran basically has nothing left to lose. Even if they are wiped out tactically, strategically they have some very powerful cards and are playing them.
The US military under Trump has been a series of tactical triumphs without any coherent strategic goals, beyond "make things go boom" and "exploit the chaos to make money." Iran's strategic goals would include any pain that they can inflict on the US plus keeping their regime basically intact. If they do so, their prestige would rise in the Middle East. Saddam Hussein got his ass kicked in 1991, but because he survived, he actually improved his reputation. That's where Iran is right now and there is no amount of shitposting that Trump can do to alter that fact.