Former advisor to U.S. President Donald Trump, Roger Stone, leaves the E. Barrett Prettyman United States Courthouse after being found guilty of obstructing a congressional investigation into Russia’s interference in the 2016 election on November 15, 2019 in Washington, DC.

Four federal prosecutors dramatically quit the criminal case against Republican operative Roger Stone as the Department of Justice reduced their recommendation that a judge sentence the longtime ally of President Donald Trump to up to nine years in prison.

In a revised sentencing memo filed Tuesday, Timothy Shea, U.S. Attorney for Washington, D.C., said Stone deserves to be sentenced to "far less" time in prison than what the four prosecutors, who worked under Shea, proposed Monday.

Jonathan Kravis, who delivered the closing argument at Stone's trial last fall, resigned as an assistant U.S. Attorney, according to a court filing in Washington federal court.

Kravis, who did not give a reason in the filing, will no longer work as a prosecutor for the federal government.

The other three prosecutors, Aaron Zelinsky, Adam Jed and Michael Marando, also withdrew from Stone's case, according to their own separate filings, which did not explain their decision.

But those three all will continue working for the federal government.

The four prosecutors all signed the controversial sentencing recommendation for Stone on Monday that quickly came under attack both from the Justice Department and from Trump for being too harsh.

Those prosecutors told Judge Amy Berman Jackson in that filing that Stone should get a prison term of between seven and nine years when he is sentenced Feb. 20 for crimes related to lying to Congress about his contacts with WikiLeaks during the 2016 presidential election and his efforts to get an associate, comedian Randy Credico, to cover for his lies.

Prosecutors said their proposed sentence mirrors the sentence suggested federal sentencing guidelines, which are calculated according to a formula that takes into account the severity of the crime, the type of conduct involved, and a defendant's prior criminal history.