This action shows that Trump will not conduct a less interventionist foreign policy, in spite of his earlier statements. We may be back to the illegal "Assad must go" policy. Acting as he has with no actual evidence of who used chemical weapons seems rash. But Trump is floundering on the home front and needs an opportunity to look strong and decisive again. So far, he is only effective when he can act alone. Let's hope this strike confined to the airbase indicates a change from the sort of indiscriminate bombing that killed so many civilians in Mosul recently. But that's probably too much to ask.