How WhatsApp 'army' flipped Brazil election and halted Trumpian trend

Key points

• Luiz Inácio Lula da Silva has won a fourth term as Brazil's president, defeating Flávio Bolsonaro in a run-off vote. A WhatsApp group called Lula's Army, which had grown to more than 10.8 million people by election night, is credited with boosting support for the incumbent.
• Analysts say three-quarters of the 14.1 million additional second-round voters backed Lula, who secured 51.8 per cent of the ballot. Flávio Bolsonaro initially refused to accept defeat and alleged a dirty trick by the court, while Donald Trump said the election looked rigged.
• Bolsonaro's Liberal Party later acknowledged the run-off result.