It appears to be generally agreed that the most likely diagnosis on the DSM for Trump is narcissistic personality disorder. In the world of Social Security we would agree that he has several “marked” impairments. The fact is, however, that it’s worked for him, and it will probably continue to work. Latest example: Trump has taken credit for a Japanese Bank’s pre-election decision to invest here in the U.S. We can expect this sort of thing throughout his time in office. We can also expect that he will inflate any actual accomplishments he may have (e.g., the Carrier deal) and will routinely claim success were none exists.
This will work because there will be no pushback. According to the rules of the game, when Trump makes claims like this they are merely reported, with, perhaps a paragraph toward the end (the paragraph no one ever gets to) noting that there’s no basis for his claim. The net effect will be that the American people, particularly the Trumpites out there, will be mostly unaware that Trump is scamming them. It goes without saying that the Democrats, with a few exceptions who will be marginalized, will mount no coherent pushback. So, Trump’s narcissism will work.
This sort of thing would never have worked for Obama. Not only would the Republicans have mounted sustained and coordinated attacks on him, but the media would have covered him completely differently than they have and will cover Trump. Sad.