I think it’s crazy to believe that Trump is planning to first-strike North Korea, or to invade it. He’d have to get General Mattis to agree, and he’d have to get the approval of McMaster. Both of those men are serious people who won’t tolerate bullshit or wag the dog tactics. To the extent that there is an actual military plan being devised for North Korea, those are the people who would be devising it.
The most aggressive plan I think we might see would be something like the U.S announcing that if North Korea launches another missile towards a U.S. ally, the launch site will receive a cruise missile. Any retaliation for that missile will be met with extreme force. If the North Koreans attack South Korea in any way, the result will be a pinpoint bombing campaign targeted directly at regime assets.
That of course would be a very dangerous thing to have to do, but the threat itself could perhaps deter Kim from launching more missiles.
But I suspect the point to all this is to put pressure on China. If I were to attribute any kind of strategic thinking to Trump, I would say that this looks like pretty smart strategy: You start out by declaring China a currency manipulator, threaten them with tariffs in a way that would really hurt them, then you have a summit where you tell your new friend Xi that a little help with North Korea would go a long ways towards showing good faith, and maybe you’ll have to rethink that whole currency manipulating thing… Then you couple that carrot with the big stick of a carrier group or two, and convince the Chinese that you are serious. A recent missile strike in Syria sure helps establish your level of seriousness…
Do I think Trump came up with a plan like that? Not a chance. But I could see someone like Mattis saying, 'Well, since this unpredictable lunatic is our CinC, let’s figure out how to make the crazy work in the American interest."
Being a loose cannon has its advantages - just ask Kim. A threat from Trump must carry a lot more weight than threats from Obama did - especially after the Red Line fiasco. So, if threats become a legitimate tool, the temptation is to use them. The drawback is that you better be willing to back them up.
But make no mistake - the carrier group and the bluster are likely intended more as a signal to China than to Kim. China is the only power around that can do anything about Kim without starting a war. China has always had more interest in maintaining North Korea as a buffer zone than in solving the problem. The task of hard diplomacy is to convince them that it’s ultimately in their best interest to solve the problem now. Because if there’s a war, China is going to be flooded with refugees. And if the U.S brings down the NK regime, it could mean a permanent U.S. military presence right on China’s border.
It’s certainly a dangerous game, but the fecklessness of the last few presidencies may have left no non-dangerous options on the table.