Abaya entered politics in 2013 when he ran as congressman for Cavite's 1st District under the
Liberal Party. The seat was vacant since October 2012 due to the resignation of his brother, Joseph Emilio Abaya, to serve as Transportation Secretary. Abaya won the seat gaining 94,283 votes or 67.96% of the total valid votes cast. In the
16th Congress, he was the vice-chairman of the
House Committee on Information and Communications Technology; and assistant majority leader of the
Committee on Rules. He also authored and filed a bill that would reinstate the mandatory
Reserve Officers' Training Corps in all colleges and universities. In the
2016 general elections, Abaya ran again for a second term as congressman and won. He also helped in the
presidential campaign of Liberal Party candidate
Mar Roxas. In the
17th Congress, he served as the vice-chairman of the
House Committees on Climate Change,
Information and Communications Technology, and
Science and Technology. Abaya ran again in the
2019 House of Representatives elections and won with 78.56% of his district's votes. In the
18th Congress, Abaya served as the chairman of the
House Special Committee on Bases Conversion; vice-chairman of the Committees on Climate Change, Information and Communications Technology, and Science and Technology; and member of the Committees on
Government Enterprises and Privatization,
Housing and Urban Development, and
Social Services. He was among the 12 members of the opposition Liberal Party that joined the “Super Majority Coalition” of the House of Representatives dominated by allies of President
Rodrigo Duterte. == Personal life ==