First Three Letters

He is the first three letters in a lot of words:
Con-torted
Con-ceited
Con-trolling

He is the first three letters in all of these words:
Con-desending
Con-trary
Con-tentious

He's the first three letters in each of the words:
Con-cerning
Con-spiring
Con-vict

Conspiring, controlling
He's a convict
We know where he'll take us
We all can predict

Donald's a convict
Donald's a con
He as our president
Is certainly wrong