Development: A debate over parliamentary rules looks set to delay the opening of the Brazilian congress' ethics committee inquiry into Eduardo Cunha, the speaker of the lower chamber of congress, and the man with the sole responsibility to initiate impeachment proceedings against President Dilma Rousseff. Significance: Members of the left-wing Partido Socialismo e Liberdade (PSOL) and Rede Sustentabilidade, the party of former presidential candidate Marina Silva, had hoped to start the inquiry this week. But Cunha’s allies in the congressional committee have argued that three ordinary parliamentary sessions need to elapse from the time the complaint was first presented. With…