[High Praise! to The Astute Bloggers]
[YouTube direct link] (Viewer #2,765)
I can’t guarantee that none of these are photoshopped, but they all look pretty legit to me (except maybe that Jimmy Carter one – that may be a tweak of the Bush “Miss Me Yet?” sign, since the word “Me” isn’t underlined as it is in the one I’ve seen verified as genuine.)

My favorite:
“A taxpayer voting for Obama is like a chicken voting for Colonel Sanders”
Got this in an email from my sweet spouse. Though y’all would enjoy it.
A NON-taxpayer voting for Obama is like a leech voting for FREEEEEEEEEE Colonel Sanders”
tax payees*
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Great stuff… I especially liked the IF YOU VOTED TO PROVE YOU WEREN’T A RACIST…/idiot one.
#2 – seanmahair,
Most excellent link. One could do a variation every day till election day without running out of material. You get Bacon!