WASHINGTON, DC - JANUARY 21: U.S. Vice- President Joe Biden and Jill Biden dance during the Commander-In-Chief's Inaugural Ball January 21, 2013 in Washington, DC. Obama was sworn in today for his ... more 

WASHINGTON, DC - JANUARY 21: U.S. Vice- President Joe Biden and Jill Biden dance during the Commander-In-Chief's Inaugural Ball January 21, 2013 in Washington, DC. Obama was sworn in today for his second term in a public ceremonial swearing in.. (Photo by Joe Raedle/Getty Images) less