Personally I think ingeniously disingenuous may be closer to the mark. Never understimate Herr Trumpness. He has a knack for fooling a lot of the people a lot of the time.
If for nothing else, we've got to give him at least a bit of credit for being perhaps the most accomplished liar of all time.
I'm constantly amazed by his audiences being sucked in by the laughably diametric opposite of what he told his preceding audience.
I have squandered my resistance
For a pocket full of mumbles, such are promises
All lies and jests
Still a man hears what he wants to hear
And disregards the rest
Lie la lie, lie la la la lie lie
Lie la lie, lie la la la la lie la la lie
(It seems to me that there are more syllables in that chorus than I remember being in the song.)