Challenger lags incumbent in most national surveys but analysts say his supporters are better organised and can mobilise block voting.
Volodymyr Zelensky was cast in the role of a history teacher who accidentally became president in a TV show in Ukraine. He's now taking the lead in the country's presidential race and it's no joke.
As Mexicans prepare to cast their ballots on Sunday, the people of Nahuatzen, an inhabitants of indigenous village tucked into the country's western mountains, are busy blocking streets with bonfires to keep out electoral authorities.
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