The politics of vice-presidential selection in Latin America

It has become common for presidential candidates in Latin America to pick running-mates from outside of their own political parties in the form of political independents or politicians from other parties. As witnessed in several recent cases, this has added a new dynamic to Latin American presidentialism, not least in situations of political crisis. Drawing on a new database, the present paper enquires into the factors that may lead prospective presidents to select such “external vice-presidents”. The findings show that the logics behind selecting either a politician from another party or a political independent as running-mate differ. While the size of the presidential candidate's own party explains the decision to select vice-presidential candidate from another party, the choice of an independent is determined by the fragmentation of the party system. Furthermore, there is evidence that previous experiences of vicepresidential succession makes the selection of an independent running-mate more likely, possibly as a attempt to guard against challenges to the future presidency. Generally, presidential hopefuls tend to pick external running-mates who lack a strong political following, which also indicates that electoral logic is often mitigated by concern for the stability of the eventual presidency.