MP Simon Danczuk has resigned from the Labour Party ahead of June's election.
Danczuk, who has served as MP for Rochdale since 2001, was suspended by Labour last year after reports that he sent illicit texts to a 17-year-old girl.
He has since tried to rejoin the party but the appeal was rejected by Labour's National Executive Committee, leaving Danczuk to blast what he termed a cabal of "Corbyn stooges" in an interview with talkRADIO.
Today he submitted his formal resignation from the party, saying it is "no longer the positive political movement that I joined nearly 30 tears ago" and is now "more interested in serving its own ends rather than those of hard-working people."
He added: "With frontbench spokespeople, such as John McDonnell, continually obsessing about Karl Marx, the benefits of communism and celebrating the reign of Joseph Stalin, I feel the Labour Party has totally lost touch with its social democratic values and, indeed, with reality in 21st Century Britain."
Danczuk also alleged that Labour are treating the seat of Rochdale as "a 'safe seat' into which they can simply parachute a Corbyn-support candidate."
Danczuk has previously hinted he will stand for re-election as an independent, but has yet to give official confirmation.