WASHINGTON (AP) — The Justice Department on Wednesday recommended a dramatic reduction in the prison sentence of imprisoned lobbyist Jack Abramoff, who became the key witness against lawmakers and congressional aides he spent years corrupting.

Prosecutors asked federal judges in Washington and Florida to shave years of prison time off his sentence, citing his work in an FBI investigation that sent numerous powerful people to prison and contributed to the Republican Party's loss of Congress.

"It is appropriate given Abramoff's extraordinary cooperation to date, cooperation which can be wholly or partially credited for the convictions of a member of Congress, five high-level legislative branch officials, one high-level executive branch official and two other mid- to low-level public officials," Justice Department prosecutors said in documents filed in Washington's federal court.