There is no doubt that a significant portion (I have no idea how many) of his base could not care less. I also believe that there are a lot of people who have been taken in by him.
The fascinating thing to me as an observer is how he commands support in the face of lying, cheating etc. and how he has convince his supporters to ignore objective reality and accept only his version of truth and facts. He has achieved pretty much nothing notwithstanding his continually touting deals of the century etc. He is probably the worst negotiator I have ever seen and yet his supporters are always talking about his deal making skills etc. He inherited a growing economy which he continually denigrated during the campaign and afterward and continued to grow it albeit more slowly. He promotes himself tirelessly with fictional accomplishments. He has undoubtedly the worst record for hiring people in history with virtually his entire cabinet having turned over with him subsequently calling them stupid losers etc and many having been indicted.
It is fascinating to me.