Joe Biden

AP455273496110.jpg

President Barack Obama delivers the State of Union address before a joint session of Congress in the House chamber Tuesday, Jan. 28, 2014, in Washington, as Vice President Joe Biden, and House Speaker John Boehner of Ohio, listen. (AP Photo/Larry Downing, Pool)

AP299019479791.jpg

President Barack Obama delivers the State of Union address before a joint session of Congress in the House chamber Tuesday, Jan. 28, 2014, in Washington, as Vice President Joe Biden, and House Speaker John Boehner of Ohio, listen. (AP Photo/Larry Downing, Pool)

AP696165409563.jpg

Vice President Joe Biden administers the ceremonial Senate oath to Sen. Tim Scott, R-S.C., during a ceremony in the Old Senate Chamber on Capitol Hill in Washington, Tuesday, Dec. 2, 2014. Scott's mother Frances Scott holds the bible. Earlier, Scott was officially sworn in by Biden of the floor of the Senate. (AP Photo/Susan Walsh)

AP720490224786.jpg

Vice President Joe Biden speaks at an annual convention of port authorities, Wednesday, Nov. 12, 2014, in Houston. (AP Photo/Pat Sullivan) ** FILE **

AP502533791070.jpg

U.S. Vice President Joe Biden speaks at the annual Atlantic Council Energy and Economic Summit in Istanbul, Turkey, Satuday, Nov. 22, 2014. Biden on Friday became the latest in a parade of U.S. officials trying to push Turkey to step up its role in the international coalition's fight against Islamic State extremists. (AP Photo/Emrah Gurel)

AP502533791070.jpg

U.S. Vice President Joe Biden speaks at the annual Atlantic Council Energy and Economic Summit in Istanbul, Turkey, Satuday, Nov. 22, 2014. Biden on Friday became the latest in a parade of U.S. officials trying to push Turkey to step up its role in the international coalition's fight against Islamic State extremists. (AP Photo/Emrah Gurel)

Biden.JPEG-0c2e2.jpg

Vice President Joe Biden is introduced by Holocaust survivor Nesse Godin as he arrives to address the Jewish Federations of North America General Assembly at the Gaylord National Harbor Convention Center in Oxon Hill, Md., Monday, Nov. 10, 2104. (AP Photo/J. Scott Applewhite)

Biden The Tiebreaker.JPEG-04868.jpg

Vice President Joe Biden addresses the sixth North American Strategic Infrastructure Leadership Forum welcoming reception in Washington in this Tuesday, Oct. 28, 2014, file photo. (AP Photo/Cliff Owen, File)

obama.jpg

President Barack Obama gets his change after paying for his lunch as he and Vice President Joe Biden make an unannounced visit to Ray's Hell Burger in Arlington, Va., May 5, 2009. White House photo.

79ccb832d657b828620f6a7067003f8b.jpg

Former Vice President Joseph R. Biden is left standing in the crosshairs in the Democratic presidential race with the revelation that his son Hunter made hundreds of thousands of dollars through his employment with Burisma, the largest private gas company in Ukraine. (Associated Press/File)

7a344d24b9f80b27620f6a7067004b6d.jpg

Vice President Joe Biden picks up his notes as he prepares to leave after speaking at Renton Technical College in Renton, Wash., Thursday, Oct. 9, 2014. (AP Photo/Elaine Thompson)

20141008edsuc-a.jpg

This medal is for throwing myself on Joe Biden's mouth. (Illustration by Dana Summers of the Tribune Media Services)

9cf84b9b4d35c027610f6a7067006698.jpg

FILE - In this Thursday, Oct. 2, 2014 file photo, Vice President Joe Biden speaks to students, faculty and staff at Harvard University in Cambridge, Mass. Biden is due to headline a Democratic campaign rally in Las Vegas, with a downtown appearance Monday, Oct. 6, 2014, to talk about raising the minimum wage. (AP Photo/Winslow Townson,File)

111122afe2877f26610f6a7067003a40.jpg

Vice President Joe Biden dons a Joplin High School baseball cap during a dedication ceremony for a combined high school and vocational school that replaces one destroyed by a deadly tornado more than three years ago, Friday, Oct. 3, 2014, in Joplin, Mo. (AP Photo/The Joplin Globe, Laurie Sisk)