I agree with some of what you say. I could see this meeting with the Senators being useful either way - to bluff NK or to warn our allies we may be ready to attack. Trump wants NK to take the 1st step. If Trump puts enough pressure on Fat Boy he may make a fatal mistake.
I’m not suggesting that this means military action isn’t still possible. Given a long enough timeline on the current course, it’s very probable. I’m just suggesting that it would be strategically stupid to make a move like this tipping your hand that intervention is imminent if at really is. To me it suggest that our I.N.T.E.L.I.G.E.N.C.E. is saying Kim doesn’t think our threats are credible. Basically, he isn’t scared enough to break.