Clinton has chosen former Virginia Governor (2006-2010) Tim Kaine. Unlike his Republican counterpart, Kaine is not a sitting governor; he is currently serving in the U.S. Senate. But Kaine served one term as Governor of Virginia—the maximum allowed under the state constitution. He was elected governor in 2005, after serving one term as lieutenant governor.
Kaine brings extensive political experience in a number of roles to the Democratic ticket. In 2009, while serving as governor, Kaine was named Chair of the Democratic National Committee, a role he continued after the conclusion of his term as governor in 2010. In 2012, he ran for and won the U.S. Senate seat formerly occupied by the retiring Jim Webb (D-VA). He is currently in the midst of his first term in the Senate. Kaine also has executive experience at a more local level; he was the mayor of Richmond, Virginia, from 1998-2001.
This was not the first time Kaine received speculation as a potential vice-presidential nominee. Many onlookers expected the 2008 Democratic nominee to pick the then-sitting Governor Kaine as his running mate, adding a popular governor from a key state to the ticket. But Obama, perhaps seeking a candidate with more foreign relations experience, selected Delaware Senator Joe Biden.
While Clinton’s selection of Kaine may not please those urging her to pick a candidate more popular with the progressive wing of the party, the Virginia Senator is considered by many to be a “safe” pick. Regardless, his selection all but ensures that on January 20, 2017, for the first time since 1972, a vice-president with gubernatorial experience will take the oath of office.
*Even in the unlikely event of a third-party victory, the vice-president will likely be a former governor. The most prominent third party candidate, Libertarian (and former Governor of New Mexico) Gary Johnson, also chose a running mate with gubernatorial experience: former Massachusetts Governor William Weld.