Brazil has relaunched its presidential campaign after the untimely death of one of the candidates last week in a plane crash.
President Dilma Rousseff is now not expected to win the October 5 poll outright due to a possible sympathy vote for the late socialist party replacement.
A second round run off is predicted.
However latest polls have given the government a six percentage point rise in its approval rating, probably due to a slow down in inflation which is a major voter concern.
The Brazilian airforce is studying the black box for clues as to what caused the plane carrying presidential candidate Eduardo Campos to crash killing all seven people on board.