Actually what Chomsky notes is how the idea of "radical" laws such as that a person can't be kicked off their health plan if they develop cancer are not unpopular, but wildly popular with the public in polls. Nonetheless in the decades prior to Obamacare, despite its popularity, due to institutional reasons it did not become law.
> the existence of Trump in the first place: his base chose him
Chomsky said early on Trump support came mostly from the base, and the power structure did not want him.
You're knocking down a straw man - inventing things Chomsky did not say, attributing them to him, then condemning him for words you put in his mouth, when he often said the opposite.