Peru’s Roberto Sánchez and Keiko Fujimori urge caution as vote count continues in very tight presidential election

Peru’s recent history of presidential elections advises caution when the margin is measured in tenths of a percentage point. If anyone knows this better than anyone else, it is Keiko Fujimori, who lost by a hair to Ollanta Humala in 2011, to Pedro Pablo Kuczynski in 2016 and to Pedro Castillo in…