Martin London, a lawyer who represented former Vice President Spiro Agnew, said that President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE should resign from office to keep federal prosecutors from prosecuting his family.

“It’s only going to get worse,” London said Friday during an appearance on MSNBC's "Morning Joe."

“We already have everybody, you know — the rats are leaving the ship. He’s lost [Richard] Gates, [George] Papadopoulos, [Michael] Cohen, [Michael] Flynn, now [David] Pecker," London said. “He’ll probably lose others from the Trump Organization.”

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Cohen, Trump's former personal lawyer, pleaded guilty this week to various charges, including campaign finance violations related to payments he said he was directed to make to two women who claim to have had affairs with Trump. Cohen said he made the payments to influence the 2016 presidential election.

Gates, a former campaign official who worked for years with former Trump campaign chairman Paul Manafort Paul John ManafortOur Constitution is under attack by Attorney General William Barr Bannon trial date set in alleged border wall scam Conspicuous by their absence from the Republican Convention MORE, was the star witness against his boss in a trial that ended this week with a guilty verdict against Manafort.

Flynn, Trump's first national security adviser, pleaded guilty to lying to the FBI, while Papadopoulos, a former unpaid foreign affairs adviser to Trump's campaign, also pleaded guilty as part of the special counsel's probe.

Pecker, the head of the media company that owns the National Enquirer, is reportedly cooperating with investigators in their investigation into Cohen as part of an immunity deal.

London represented Agnew, who served as vice president under President Nixon. Agnew resigned while in office in 1973 under legal pressure over a bribery scandal 10 months before Nixon stepped down.

“We don’t know a quarter of what’s in the pocket of the prosecutor,” London said of Mueller.

“If he has any interest at all in not only saving his skin, but the skin of his child, his children, his son-in-law, his grandchildren, his daughter — this is a time when he’s got to seriously think about that,” London said, referring to Trump. “Now, is he capable of that, of serious thinking? Frankly, I doubt it.”

London said Trump should ponder his advice because his current lawyer, Rudy Giuliani, who he also labeled a "clown," isn’t going to get him anywhere.

“He’s going to be advised by people like clown Giuliani and people who don’t know that truth is truth, then he’s not going to get anywhere,” he said. “The national interest is what drove the Agnew resignation.”