JV Ejercito

On February 27, 2001, Ejercito filed his candidacy to run for mayor of San Juan. Despite his father's removal from office as President of the Philippines due to the Second EDSA Revolution a month prior, Ejercito stated that in San Juan, "there is still a strong clamor for me to run."[10] He eventually served as mayor for three consecutive terms from 2001 to 2010. It was during his term when San Juan was converted into a highly urbanized city in 2007. He was succeeded by his mother Guia Gomez.

During the 2010 elections, Ejercito ran for the position of representative for the lone district of San Juan. Over the course of his term, Ejercito authored and/or sponsored 161 bills and/or House measures, five of which were approved by the House and passed to the Senate for consideration:[11]

• HB 4225: Participatory Governance Through CSOs Empowerment Act of 2011[12]
• HB 4541: Mercury Exposure Information Act of 2011[13]
• HB 4565: Local Housing Boards Act[14]
• HB 5870: Cadastral Survey Act of 2012[15]
• HB 6144: Domestic Workers Act of 2012 or Kasambahay Bill [16]

Ejercito presiding over a Senate session in 2017

On October 1, 2012, Ejercito filed his certificate of candidacy for the 2013 Philippine Senate election, where he won as the 11th placer out of 12 winning senators elected.[17]

During his six years in the Senate, Ejercito filed a total of 140 bills and resolutions. Ejercito also chaired the Senate Committee on Economic Affairs and the Committee on Urban Planning, Housing and Resettlement and the Health and the Demography Committee in the 17th Congress.

He was the principal sponsor of the Child Safety in Motor Vehicles Act (R.A. 11229), which requires children 12 years old and below and shorter than 1.50 m (4 ft 11 in) to sit on child safety seats when riding in a vehicle.[18]

On April 6, 2016, Sandiganbayan Fifth Division issued an arrest warrant against Ejercito and four other government officials, in connection with allegations on misuse of funds during his term as San Juan mayor.[19] However, Ejercito was cleared of the charges because the case was dismissed.[20]

Ejercito ran and launched a campaign to secure a second consecutive term in the 2019 Philippine Senate election, his candidacy was endorsed by President Rodrigo Duterte.[21] His half-brother, former Senator Jinggoy, who was previously jailed and charged with multiple counts of plunder in 2014, also sought a Senate return. During the campaign, the siblings had a disagreement[22] in the idea of them running at the same time, Ejercito expressed that Estrada running would "ruin his chances", he also threw shade against Estrada as he referred himself as "The Good One" in political ads. Eventually, the half-siblings both lost as Ejercito ended up in 13th place, just a spot outside the winning circle, while Estrada finished at 15th place. After conceding defeat, Estrada wished that Senator Nancy Binay would make it over Ejercito, with both senators vying for the last spot in the partial and unofficial count, Ejercito responded by telling Estrada that he placed 13th in his own hometown, “Let him speak... It’s painful to accept that even in your own bailiwick you are unwanted,".[23]

Ejercito sought for a comeback to the Senate in 2022 and won as the 10th placer, earning his second nonconsecutive term.[24] His half-brother Jinggoy Estrada was also successful as he placed 12th.[25] In August 2022, he was elected Deputy Majority Leader and Chairman of the Senate Committee on Local Government and the Senate Committee on Urban Planning, Housing and Resettlement.[26]