The American vice president's most notable constitutional function is that of succession: if the president unexpectedly leaves office, the vice president becomes president. The process of selecting vice-presidential running mates has fallen into fewer hands over time, moving from the electorate, to party bosses and delegates, to a single person: the presidential candidate. The selection process presents challenges for democratic governance: electoral considerations may provide presidential candidates with incentive to choose vice-presidential running mates who differ from themselves politically. In cases of succession, this can lead to undemocratic outcomes and unstable policy. E very four years, not only American citizens, but spectators worldwide watch as the presumed American presidential nominees discuss, consider, and finally choose their vice-presidential running mates. The media, both domestic and international, relentlessly cover the selection processes preceding the nominating conventions. These events are often covered as part of a parlor game, with the media predicting which party can gain an advantage by choosing which potential running mate. Despite the attention given to its selection, after the general election, vice presidents tend to slip into obscurity and receive public and media attention only in regard to gaffes, controversy, and scandal. This is likely because the vice president's most notable function lies in its role as successor. 1 In case of the president's death, incapacitation, resignation, or removal, the vice president is expected to, regardless of not having entered the office through election, wield the same power and title as an elected president. Unexpected succession is not a trivial occurrence: nine US presidents, or one fifth, ascended "accidentally" from the vice presidency.