Brazil’s President Jair Bolsonaro is facing the biggest crisis of his presidency after the heads of the army, navy and air force all quit and the country recorded its highest Covid-19 daily death toll. The unprecedented resignation of the defence chiefs is being seen as a protest at attempts by Bolsonaro to exert undue control over the military. Bolsonaro’s popularity has plummeted over his response to Covid-19. Nearly 314,000 people have died, with a new daily record of more than 3,780 on Tuesday. There have been more than 12.5 million confirmed cases in the country