His political career began in the regional and municipal elections of 2002. Bermejo was a candidate for alderman of the
Ate district for the
American Popular Revolutionary Alliance. However, he was not elected. In 2004, he founded the
Marxist-Leninist left-wing movement Todas las Voces. Under the command and on behalf of the group, he made several international trips. Including Bolivia and Venezuela, for events with politically aligned circles. In 2021 an audio was published in which he is heard saying "if we take power, we are not going to leave it". Bermejo admitted the authenticity of the audio, stating that it was made a year ago. In the
2021 general elections, he was elected congressman of the republic for
Peru Libre, with 8241 votes, being the most voted candidate of his party, in Lima, for the parliamentary period 2021-2026. Despite pandemic restrictions established by the
Ministry of the Interior, Bermejo attended on 31 October 2021 to a party hosted by Minister of the Interior
Luis Barranzuela at his home located in the
district of Surco, in Lima. Upon being caught by the cameras of
Latina Televisión, he fled the place in the van of his lawyer Ronald Atencio, who reportedly was another of the guests. Bermejo claimed that "the loud music was from an adjoining house". However, neighbors of Barranzuela declared to the local press that a party did take place, that it had started in the afternoon and that due to the discomfort of the loud music they decided to call the police. On 16 December 2021 Bermejo resigned from Peru Libre. He later formed a new group called
Democratic Peru along with
Héctor Valer to promote a new constitution. == Investigation ==