An Iowa man's plea for marriage rights for his lesbian parents drew 18.3 million views on YouTube. That makes it the most-watched political video of the year.
YouTube's ranking of viral political videos has President Barack Obama's speech to the White House Correspondents' Association dinner in second place.
The third most viewed political video is the year's most-watched campaign commercial, Republican presidential candidate Rick Perry's ad criticizing gays in the military.
The popular video-sharing site released its 2011 list today.
What was your favorite political video of 2011?