Answer:
sometimes yes sometimes no
Hope this is the right Calderon your talking about lol.
Calderón served as National President of the party, Federal Deputy, and Secretary of Energy in Vicente Fox's cabinet. He served in the cabinet of the previous administration until he resigned to run for the presidency and secured his party's nomination.
A plebiscite is like an vote
Definition - A vote by people of an entire country or an district to decide the issues