Brazil’s Green Party and their third placed candidate Marina Silva have opted to remain neutral ahead of the country’s presidential runoff at the end of the month.
Silva said that by maintaining an impartial stance, the Greens “would exert more influence in national debates”.
The news comes as a blow to Dilma Rousseff who, along with her rival for the top job Jose Serra, had been courting Silva’s backing.
The contest between the two has become increasingly tight since the first-round presidential poll, with both candidates pledging to continue market-friendly economic policies and social welfare programmes.
But Silva, who had been seen as a potential kingmaker, has criticised Rousseff and Serra for their aggressive campaigning tone and their failure to promote environmental issues.