The good thing about John Bolton, President Trump’s new national security adviser, is that he says what he thinks.

The bad thing is what he thinks.

There are few people more likely than Mr. Bolton is to lead the country into war. His selection is a decision that is as alarming as any Mr. Trump has made. His selection, along with the nomination of the hard-line C.I.A. director, Mike Pompeo, as secretary of state, shows the degree to which Mr. Trump is indulging his worst nationalistic instincts.

Just when you think it can’t get any worse President Trump shows he can still shock. The only hope is that his latest appointment will last as long as the two previous ones although sadly that is plenty of time for him to engage the US in a conflict with North Korea or Iran or both.