From December 2, 2007, to June 14, 2011, Levichev was the leader of A Just Russia party group in the State Duma.

Nikolai Vladimirovich Levichev did not vote as the only one on December 25, 2017, in the Russian Central Electoral Commission against candidature of Alexei Anatolievich Navalny for Russia's president authority.

He graduated from eighth grade in 410 high school Pushkin, where he studied in the same class with Sergei Mironov, with whom he lived in a doorway.

In 2006, he was elected secretary of the Presidium of the Central Council of the party Fair Russia: Motherland / Pensioners / Life.

Despite the participation in the list of many popular politicians, the party suffered a crushing defeat (5.52%) and was not included in the regional parliament.

At the V Congress of Fair Russia on April 16, 2011, he was elected chairman of the party after the early termination of Sergei Mironov.

On June 14, 2011, he resigned as head of the faction Fair Russia: Motherland / Pensioners / Life by transferring their Sergei Mikhailovich Mironov.