Luiz Inácio Lula da Silva, the most popular president in Brazilian history, is ineligible to run for a third four-year term, and has given Ms Rousseff, his former political adviser, his unflinching support.

If the election were held today, according to recent polls, Ms Rousseff would pick up 50 per cent of the vote, putting her far ahead of her main rival José Serra, a former health minister, on 28 per cent. – Telegraph