In Pictures: Tim Kaine Through the Years

Virginia Gov. Timothy M. Kaine gives a thumbs up after being sworn in at the reconstructed Colonial Capitol in Williamsburg, Virginia, Jan. 14, 2006.

Virginia Gov. Tim Kaine, right, and Maryland Gov. Martin O'Malley testify on Capitol Hill in Washington, Sept. 26, 2007, before the Senate Environment and Public Works Committee hearing to discuss the impact of global warming in the Chesapeake Bay.

Queen Elizabeth II and Virginia Governor Tim Kaine visit the College of William and Mary in Williamsburg, Virginia, May 4, 2007.

President Bush, left, first lady Laura Bush, second from left, Virginia Governor Tim Kaine, right, and his wife Anne Holton walk on the Virginia Tech campus in Blacksburg, April 17, 2007.

Then-Democratic Presidential nominee, Sen. Barack Obama, D-Ill., right, puts his arm around then-Virginia Gov. Tim. Kaine during a town hall meeting in Chester, Virginia, Aug. 21, 2008.

With the Potomac River in the background, District of Columbia Mayor Adrian Fenty, left, and Maryland Gov. Martin O'Malley, center, listen to Virginia Gov. Time Kaine, right, speak at a news conference about proposed cleanup measures for the Chesapeake Bay watershed, at the Mount Vernon Estate in Mt. Vernon, Virginia, May 12, 2009.

Virginia Gov. Timothy M. Kaine, left, examines the walking stick of patient Jerry Austin, of Keokee, as he mans the registration desk during the Remote Area Medical Health Clinic at the fairgrounds in Wise, Virginia, July 24, 2009.

Michelle Marfo, 9, of Alexandria, Virginia, left, demonstrates her hand washing technique to Gov. Tim Kaine after the governor spoke about the H1N1 virus at Samuel Tucker Elementary School in Alexandria, Sept. 1, 2009.

Democratic senate candidate former Gov. Timothy Kaine, and his wife Anne Holton, right, celebrates his win over Republican George Allen during his victory party in Richmond, Nov. 7, 2012.

Sen. Tim Kaine, left, accompanied by Vice President Joe Biden, gestures during a round table discussion on gun violence, Jan. 25, 2013, at Virginia Commonwealth University in Richmond.

Sen. Tim Kaine, center, speaks as Senate Democrats gather outside the Capitol to urge Speaker of the House John Boehner, R-Ohio, and other House Republicans, to break the impasse on a funding bill and stop the government shutdown that is now in its second week, Oct. 9, 2013, in Washington, D.C.

Sen. Tim Kaine, chairman of the Senate Foreign Relations Subcommittee on Near Eastern, Southern and Central Asian Affairs, second from right, speaks as Heba Sawan, left, wipes away tears during a news conference with sister Amineh Sawan, right, and Anas al-Dabas, second from left, on Capitol Hill in Washington, D.C., Feb. 6, 2014. The Sawan sisters were survivors of the August 2013 chemical weapons attack in Moadamiya, Syria, that left more than 1,200 Syrians dead and many more wounded.

Democratic presidential candidate Hillary Clinton and Sen. Tim Kaine, participate in a rally at Northern Virginia Community College in Annandale, Virginia, July 14, 2016. Clinton has chosen Kaine to be her running mate in the 2016 presidential election.