Incumbent President Dilma Rousseff appears to be the favorite to win Sunday's runoff against Aecio Neves.
Brazilian Socialist Party throws support behind President Dilma Rousseff's challenger.
The decision will come on October 15, even as Madrid insists a vote on independance would be illegal.
Incumbent Dilma Rousseff wins most votes, but will need to face rival Aecio Neves in a run-off.
Ruling made as Argentina refuses to obey an order to repay the debt it owes to two U.S. hedge funds.
Weeks before an October run-off, Brazil's President Dilma Rousseff is regaining momentum.
Has been admitted to hospital with a tentative diagnosis of a tumor after suffering months of abdominal pain.
Leopoldo Lopez is accused of inciting violence during anti-government demonstrations.
Alleges officers were involved in the murder of a lawmaker.
John Tory won 40% of the vote, defeating the brother of the controversial incumbent, Rob Ford.
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