Mexico heads to its first presidential elections between two strong candidates and a blurred third option. For the first time in 30 years of democracy, Mexicans will choose between two solid and opposing options.

In Mexico there is a single-vote electoral system in which the candidate who obtains a simple majority wins. Some Mexican congressmen have tried to establish the runoff system, in which, if a candidate does not obtain an absolute majority - more than 50% of the votes - in a first vote, he goes to a new and definitive election.