When Viera Martínez bolted the NPP to join the Puerto Rico Renewal Party (PRP) in 1983, Granados became House Minority Leader, a position he held until 1988.
The organization operated until 1986 and included among its leaders a wide array of prominent statehooders, such as attorney Zaida Hernández, who served as House Speaker and subsequently an appellate court judge.
The present governor, Luis Fortuño, who led his party in 2008 to its largest landslide victory in history, was a summer intern at Granados' office while studying at Georgetown University.
The best recognition of the "breeding ground" status of his office can be found in the refusal by a political opponent, House Speaker Severo Colberg to approve a staffer selected by Granados, Manuel Agromayor, which resulted in litigation in the United States Circuit Court of Appeals for the First Circuit and reached the United States Supreme Court.
[citation needed] A forceful public speaker, he organized the mass rallies that provided the "grand finales' of the NPP's electoral campaigns in 1976 and 1980 where his party's candidate, Carlos Romero Barcelo, was elected and subsequently narrowly reelected to the governorship.
He also produced a daily 30 second TV ad transmitted under the name Directo Al Punto credited by some with having contributed greatly to Pedro Rossello's triumph as governor in 1992 and 1996.
As chairman of the Socio-Economic and Planning Commission, he conducted studies on the condition of Puerto Rico's economic infrastructure including land, air and maritime transportation, water and sewage, energy production and waste management and was responsible for most of Rosselló's legislative agenda that laid the foundation for the major accomplishments of his gubernatorial administration.