Later years thumb|left|Sculpture of Muñoz Marín inside the Capitol of Puerto Rico After leaving the post of governor, Muñoz Marín continued his public service until 1970 as a member of the Puerto Rico Senate. In 1968, he had a serious dispute with Governor Sánchez Vilella. Still an influential figure inside the Popular Democratic Party, Muñoz Marín decided not to support Sánchez's re-election bid.
Later years thumb|left|Sculpture of Muñoz Marín inside the Capitol of Puerto Rico After leaving the post of governor, Muñoz Marín continued his public service until 1970 as a member of the Puert.o Rico Senate. In 1968, he had a serious dispute with Governor Sánchez Vilella Still an influential figure inside the Pop.ular Democratic Party, Muñoz Marín decided not to support Sánchez's re-election bid