It is. Then again the contrast between my guitar playing and that of {insert name of favourite guitar player here} is similarly striking. IMO Obama is and was an excellent orator by any standard - it seems to be something that successful Democratic Party presidential candidates in my lifetime share.
Compare President Trump to George W Bush when he was talking off the cuff and the difference isn't too great.
I know it has, but is there any reliable evidence of President Trump using cocaine ? IMO throwing around unfounded allegations, whether it's of drug use or of mental incapacity, isn't that helpful because it gives his supporters things that they can easily counter and then claim #FakeNews.
Focusing on those things where there is ample evidence, his lying, his flip-flopping, his legal settlements and so on is IMO a better option.