Putin, Castro, et al are all multi-billionaires. North Korea's "Dear Leader," Kim Jong-Un, and his family are billionaires, too, while his people starve in obsequious servitude. Communism always works well for the ones in charge of it.
Communism and socialism tout their great achievements "for the people" - free health care, free education and equality. But their failures remain breakfast, lunch and supper.
Donald Trump tried diplomacy with North Korea early, agreeing to meet with leader Kim Jong-un "under the right circumstances." A Nobel Peace Prize-winning overture if you're a Democrat, but an "uninformed diplomatic blunder" if you're a Republican.
It's even said that Trump offered to fly Lil' Kim over to the U.S. for discussions, but it was a mixed message. It was on United Airlines.
To sum up, years of policy failures, looking the other way, and diplomatic back-door payoffs to North Korean regimes when they threaten us have kicked the can down the road and gotten us to this point.