Senator: 1997–2001 In 1996, Santini decided to start a political career under the
New Progressive Party (PNP). He was elected to the
Senate of Puerto Rico at the
1996 general elections representing the
District of San Juan. During that term, he served as Chairman of the Senate Judiciary Committee.
Mayor of San Juan Santini entered the race for
Mayor of
San Juan in 1999 and challenged Senate President
Charlie Rodriguez in a PNP primary. Rodríguez had been the choice of the party leadership, but Santini prevailed in the primary. He went on to defeat
Popular Democratic Party candidate
Eduardo Bhatia in the
2000 elections and sought reelection in 2004 defeating Bhatia for a second time. In his 6th year as Mayor of San Juan, Santini began inaugurating major projects such as the
San Juan Natatorium in 2006, the San Juan Golf Academy in 2007, a sports-oriented magnet school and a bilingual municipal magnet school, and San Juan's Ronald Reagan Autism-Specialized Day Care Center. In 2007, Santini was elected for a third term as Mayor of San Juan but was defeated in the
2012 San Juan mayoral election and left office on January 14, 2013. During his third term the municipality imposed a secret tax on properties in the city. Investigations into the scheme revealed that $1.3 million in revenue went missing. The municipal debt at the end of Santini's tenure had reached $18 million.
Senate of Puerto Rico In 2017 Santini created Soto and Santini LLC, an advisory group providing professional services for the
Senate of Puerto Rico and various government agencies. In 2020 the office of ethics sued Santini for income he earned working for the Senate and the National Guard simultaneously. ==Personal life==