Paul Davis Ryan, Jr., aka Paul Ryan, is the U.S. Representative for Wisconsin's 1st congressional district. Willard Mitt Romney, aka Mitt Romney, is a former Governor of Massachusetts and is the Republican nominee for President in 2012.
The source image for this caricature of Paul Ryan is a photo in the public domain available via Wikimedia. The source image for this caricature of Mitt Romney is a Creative Commons licensed photo from Gage Skidmore's Flickr photostream. Grandma image adapted from a photo by Alfred Palmer available at the Library of Congress. Pet food can is adapted from a Creative Commons licensed photo in Rocky Mountain Feline Rescue's Flickr photostream. Other sources and credits: Grover Norquist drowning Uncle Sam in a bathtub, Paul Weyrich touting voter suppression, Ayn Rand, Simpson Bowles admonishing Teat Suckers, Antonin Scalia, Wayne LaPierre - Lobbyist Loaded for Bear, and Ronald Reagan.