Development: On 2 October Brazil’s presidential candidates held their final televised debate before the 5 October general elections. Significance: A bad-tempered, and at times chaotic, debate shed little light on what any of the candidates might do in office. If anything, the most substantive exchanges were between ‘nanicos’, the also-ran candidates who have no chance of making it through to the second round. Among the leading three, the debate was notable in that President Dilma Rousseff (Partido dos Trabalhadores, PT) did not slip up, while Marina Silva (Partido Socialista Brasileiro, PSB), the president’s erstwhile closest rival, was unimpressive. A rejuvenated…