Update: bigmac ads:
The ad was made by David Zucker, producer of movies like Airplane!, Naked Gun, and Scary Movie 4. When GOP officials saw the ad, they declined it. I haven’t read anything saying whether or not the GOP funded the ad or otherwise participated in making it. If they did, and if it was intended for TV, then it’s surprising it got this far. Perhaps it was really intended for this kind of viral online distribution in the first place?