Will Trump order a strike on NK?

[Absentee Voting Ghost of Ruin]

Yes. He's has finally grasped that he can order military action, he obviously likes it, and so far it has far less negative pushback than anything else he's done. The North Korean government is very unlikely to obey his ultimatum, he'll lose face from backing down, so a strike is near inevitable. The only question left is what the consequences will be. (He is doubtless utterly ignorant of that part. "Who knew the North Korean dictatorship would use nukes on innocent civilians?")

[Absentee Voting Ghost of Ruin]

Yeah, the Chinese are basically "handling" (I use that term loosely) NK, so Trump isn't going to do a thing to interfere with their actions.  It's a miracle he got XI to do anything.

This. I have a gut feeling that China will successfully defuse the situation and will get NK to stand down.

Plus Pence is going to be there tomorrow (in South Korea) which will be interesting in and of itself.  Launching a nuke anywhere near where a U.S. VP will be is pure suicide.  He may be a crazy fat kid, but let's hope he's not a batsh**t insane fat kid.

Hopefully. This kid was raised his whole life being told that he's a God. The cult of personality surrounding him is incredibly powerful; with the NK people seeing him in the same vein as his paternal grandfather who he bears a strong physical resemblance to. I hope that he's not genuinely insane; but we'll see.

Whether he's sane or not, also realize that he probably knows that failing to hang onto absolute power is s death sentence. Push him into a no-win situation, and who knows what will happen.