The North Korean peace overture is almost certainly a trap. Trump is a fool to accept a summit.
The mechanism is simple. Arrange the meeting on tantalizing terms… then cancel abruptly on the eve of it, or walk away during, claiming Ttump was an arrogant pompous ass that insulted NK sovereignty and acted in bad faith. Trump will try to spin it, but fail. Kim looks powerful and in charge. NK and China 1, US and SK 0.
Hell, it might not even have to be a lie… Trump may screw it up without help.