
An artist who goes by KWVH on Etsy has created these fabulous t-shirts:

They also have shirts that say PLEASE F****ING VOTE which I won't subject you to (nor would I wear...) but do a pretty brash job of getting the point across.
VOTE. NOW. GET ON IT. I don't care who you support (*cough*OBAMA*cough*) just get out there and DO IT.