If you know what Tijuana Bibles are, you know what to expect here. If not, I'll be polite and add that this link is NSFW:
The 1934 George Bush John McCain Tijuana Bible
There are a ton of other great comics on Ethan Persoff's site (like old anti-drug comics, etc.), so after you're done laughing or being completely offended, prepare to lose a couple of hours...