Brazil election poll shows very tight presidential race

BRASILIA (Reuters) - President Dilma Rousseff is running neck-and-neck with her main rival, Marina Silva, less than three weeks before Brazil's presidential election that will likely go down to the wire in a runoff, a poll published on Monday showed.

The new survey was consistent with polls last week that showed Rousseff had recovered from an initial surge by environmentalist Silva and the race will go to a second-round vote that looks so close that some analysts are reluctant to pick a favourite.