In 2020, Kuznetsov was appointed secretary of the central committee of the For Truth party initiated by writer Zakhar Prilepin.

Since October 2021, he has served as deputy of the 8th State Duma,[1][2][3] having received the mandate previously declined by Prilepin following the 2021 Russian legislative election.

[4][5] After 2022 Russian invasion of Ukraine, Kuznetsov declared the party's plans to open branches in Kherson and Lugansk.

[9] [10] [11] In the spring of 2023, together with the office of the Ukrainian Ombudsman, he started mutual verification of the conditions of the captives and asked the President of the Russian Federation to assist in the issue of exchange of civilian prisoners.

[13] Kuznetsov became the victim of a hoax when he added the fictional pro-Kremlin poet Gennady Rakitin as a "friend" on VKontakte.