If this was proposed by some serious leader, it would be worth analyzing the pro's and con's of the decision from the military point of view. But, in this case, given the character and the track record of the current US president, the default assumptions should be that
1) The actual facts and the real world consequences on the matter have not been given any serious thought
2) The motive behind the announcement is something else than what it is claimed to be
3) The timing of the announcement is likely a product of entirely short-term political reasons and
4) At least something related to the announcement itself is either completely untrue or at the very least, presented in a hugely misleading fashion.
Those factors have been true for about everything done by pres. Trump so far, so until proven otherwise, those factors should be assumed to be true in this case as well. And due to this, I don't have much of a motivation to try to analyze the issue itself in terms of actual military realities, since the actual military realities are most likely irrelevant for the decision making process behind this. I would rather analyze this in terms of political image building, as an attempt to control the media attention or very simply as a yet another petty decision to reverse something Obama has done, rather than as a fact-based military decision, since those are more likely the actual reasons behind this announcement.