I didn’t know that comic books where that old! (even wiki doesn’t mention it). I knew cartoons and mocking drawings where used quite a lot in the past centuries, but these are total comic books. You can find a lot of different ones here.

I found one that was used in the American presidential campaign. The comic mocks the alliance between Willie (the president) and the trusts.
(The site is French, but lots of comics are in English.)