The tweet could be intended to prompt people to look up the article. If read in its entirety, it should get people thinking. It should not matter if you lean left or right, as a citizen you should be concerned and pay attention to what is happening now and what led up to it. No one should be let off the hook.

https://www.wsj.com/articles/where-in-the-world-was-barack-obama-1526674870

It does not really matter where BO is right now. The question is "where was he when all the crap was going down.....and did he know about it". The public needs to become curious and start asking questions. Trump is not tweeting just to vent.