Question

What does having only a one-term president do for Mexico? causes an upheaval every six years allows more people to be president prevents a democracy prevents dictatorship

Answer 1

Having only a one term President do have an effect on Mexico. It Prevents Dictaroship 

Answer 2

In general, having only a one-term president in Mexico "prevents dictatorship", although it should be noted that opinions differ on this, and that some people think differently.