What is the similarities and differences between Mexico and the US chooses a president?

Answer 1

In both countries, a presidential election is held once in a constitutionally determined period: 4 years in the U.S., 6 years in Mexico.

In the U.S., a president at the end of a first term can be re-elected; in Mexico there is a one-term limit.

In the U.S., it has been the case for many years that either a Republican or Democart could be considered a realistic candidate, and the orrice has gone back and forth between the two. (Third-party candidates have also run, but none has recently been elected.) Throughout most of the 20th Century, the Mexican president always belonged to the PRI, or Partido Revolucionario Institucional, so every 6 years the next president was simply announced, and virtually everybody voted for him as a formality. The two most recent presidents, however, belong to the PAN, or Partido por la Accion Nacional.