First term (2001–2007) Recto was elected to the
Senate in 2001, becoming the youngest Senator of the
12th Congress at the age of 37. In the Senate, he chaired the Committees on Ways and Means and on Trade and Industry. He was co-chairman of the Congressional Oversight Committees on the Proper Implementation of the National Internal Revenue Code (NIRC) and on the Official Development Assistance (ODA). He was also chairman of the Accounts committee. During his first six-year term as Senator, he was largely responsible for the passage of laws with positive impact to consumers, small entrepreneurs, workers and industry.
Second term (2010–2016) He was proclaimed as one of the winning senatorial candidates of the
2010 Senate elections. On July 22, 2013, at the start of the first day of the 1st Regular Session of the Senate for the 16th Congress, Recto was elected Senate President Pro-Tempore, the second highest post in the Senate and was also the Chairman of the Senate Committee on Science and Technology and member of the bicameral
Commission on Appointments.
Third term (2016–2022) Recto ran for re-election in the
2016 Senate election under the
Koalisyon ng Daang Matuwid of
Liberal standard bearer and presidential nominee
Mar Roxas and won placing 11th in the polls. On the opening day of the 17th Congress, July 25, 2016, Senator
Francis Escudero nominated Recto for the presidency. Senator
Antonio Trillanes IV seconded Escudero's nomination. During nominal voting,
Koko Pimentel and Recto voted for each other. After losing the vote, Recto automatically became the Minority Leader. He was joined by Escudero and Trillanes in the minority bloc. Recto, in his acceptance speech for the post, vowed that the minority would cooperate with the Duterte administration's plans if these serve "the public interest." However, he said, they would be "duty-bound" to oppose the majority's agenda if it "hurts the nation." When the Senate underwent a reorganization on February 27, 2017, Recto, after getting 17 votes, was declared Senate President Pro Tempore, replacing
Franklin Drilon. For the 17th Congress, he authored the following laws: Murang Kuryente Act, Pantawid Pamilyang Pilipino Program Act, Child Safety in Motor Vehicles Act, Universal Health Care Act, Philhealth Coverage for PWDs, National Integrated Cancer Control Act, Tax Amnesty Act, The New Central Bank Act, Lifting Quantitative Import Restriction on Rice, Social Security Act, First 1000 Days of Life, Universal Access to Quality Tertiary Education, Comprehensive National Feeding Program, Free Irrigation Service, Ease of Doing Business/Expanded Anti-Red Tape Act, Free Internet Access in Public Places, Extending the Validity of Philippine Passport and Driver's License, National ID System, and Designating Casinos as Covered Persons under the AMLA. Recto kept his post as Senate President Pro Tempore in the 18th Congress. In September 2018, Recto left the Liberal Party to re-join the
Nacionalista Party. ==National Economic and Development Authority (2008–2009)==