Enrique Peña Nieto is way ahead in the final polls for Sunday's election. John Paul Rathbone has a useful guide to the contest:

What about security and the "drugs war"? Given that over 50,000 people have died in the past six years, this is the Box of Horrors that none of the candidates have dared open or offer many specifics on – except general rhetoric about how they all want to bring down violence. How to achieve that, though, is the harder question – especially as 8 of 10 Mexicans back President Felipe Calderon’s policy of using the army to fight drug cartels, according to a poll by the Pew Research Centre. Mr Peña has said he wants to set up a gendarmerie of 40,000, and that security spending should rise further until it approaches something close to Colombia’s levels of 5 per cent of GDP. He has also hired General Oscar Naranjo, Colombia’s former police chief, as his security adviser. The "Drugs War" is therefore likely to continue, even if its tactics somewhat change. But policy specifics are likely to made-up on the hoof.

Daniel Hernandez reports on opposition to Peña Nieto and his party, the Institutional Revolutionary Party (PRI):