On May 5, 2021, DILG Secretary Eduardo Año announced his tenure as the next Chief of the Philippine National Police.

He ran as part of the Lacson-Sotto senatorial slate with the party Partido para sa Demokratikong Reporma.

[6] During his tenure, Eleazar helped bust the biggest cybersex gang in Central Luzon.

[7] He eventually became the Quezon City Police District director in 2018[3] after a recommendation by DILG Secretary Eduardo Año.

[10] In March 2019, Eleazar received controversy for scolding a cop, Anwar Nasser, for extortion.

[13] Eleazar received notoriety on March 6 when videos of him lashing out, slapping, and cursing corporal Marlo Quibete for extortion went viral on news outlets.

[17] On May 5, 2021, Eduardo Año announced his designation as the next Chief of the Philippine National Police[2] after the acceptance of Rodrigo Duterte.

[22][23] Senator Win Gatchalian supported his tenure, expressing that Eleazar's administration is "no-nonsense" and "action-oriented".

[26] When his tenure started, he gained controversy on June 1, 2021, for berating a cop which killed a 52-year-old woman.

[33][34] In July 2021, a channel posted a video in which Eleazar dismissed candidates which supported New People's Army (NPA) rebels, gaining a total of 20,324 views on YouTube.

He substituted the candidacy of radio commentator and PWD advocate Paolo Capino, which was withdrawn on November 12, 2021.

[42] His platform focused on improving peace and order in the Philippines,[43] and expanding PNP services.

[3] On February 11, 2022, Mike Velarde of El Shaddai blessed Eleazar to run for senator.

[44] The following month, 600,000 policemen from the Philippine Association of Detective and Protective Agencies Operators (PADPAO) decided to vote for Eleazar.