Gustavo Petro (Historic Pact) and Rodolfo Hernández (League of Anti-Corruption Governors) dispute the presidency of Colombia in the second round. The winner this Sunday will take office on August 7 for a four-year term. Follow here the minute by minute of the elections. Who is Gustavo Petro This is Rodolfo Hernández Analysis: What do Gustavo Petro or Rodolfo Hernández need to win…,