Bolivia heads into an Oct. 19 runoff between centrist Rodrigo Paz Pereira and right-wing ex-president Jorge “Tuto” Quiroga after nearly 20 years of socialist rule.

One candidate is Rodrigo Paz, a conservative centrist senator and son of a neoliberal ex-president who is pitching himself as a moderate reformer.

With the last campaigns only one day in the rearview mirror, Bolivia’s political world has delved into preparations for an unprecedented runoff election that will reveal the extent of a centrist senator’s unexpected traction in the presidential vote.

Early results in Bolivia's presidential election show the country headed for an unprecedented runoff following a vote in which a dark horse centrist, Sen. Rodrigo Paz, drew more votes than the right-wing front-runners, although not enough to secure an outright victory.