Roger Stone Roger Jason StoneThe agony of justice Our Constitution is under attack by Attorney General William Barr Justice IG investigating Stone sentencing: report MORE said Monday that he may be willing to cooperate with special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE, but vowed he would never testify against 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.

"There is no circumstance in which I intend to be pressured in order to testify against the president. First of all, I have nothing that I could say about him that would be negative. Secondarily, I'm just not going to do that," Stone said during an appearance on CNN's "OutFront."

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"I wouldn't rule out cooperating with the special counsel if I can be helpful in some area, but there's no circumstance under which I would testify against the president," he added.





Speculation has grown that Mueller has narrowed his focus on Stone as a possible criminal target in recent weeks. Stone has not yet been called to interview with Mueller or testify before the grand jury, but the special counsel has in recent weeks sought testimony from a growing number of individuals linked to the longtime Trump adviser.

Stone has long been the subject of public scrutiny because of his connections to WikiLeaks and Guccifer 2.0, the hacking persona that Mueller’s team now alleges was a front for Russian intelligence officers.

Asked Monday if he believes he will be indicted or called to testify by Mueller, Stone said he has "no idea."

"Look, the process is going to take its course," Stone said, before explaining that his legal costs related to the Russia investigation and "nuisance harassment lawsuits" are projected to hit $2 million.

"There is no circumstance under which I would testify against the President." - Longtime Donald Trump confidant Roger Stone https://t.co/V7PgH2eaSZ pic.twitter.com/M1UYSvVtuA — OutFrontCNN (@OutFrontCNN) August 13, 2018

Stone denied any involvement in Russian collusion, and suggested he's only a target because the Mueller probe is a "politically motivated" investigation.

He penned an opinion piece for The Daily Caller on Monday in which he accused the special counsel of violating his constitutional rights.

"It is now clear Mueller may seek to conjure up some bogus legal offense against me in an effort to force me to testify against the President, who I have known for forty years," Stone wrote. "Additionally, they seek to silence me now and, during their coming assault, to impeach the President."

His rhetoric echoes that of Trump, who frequently derides the Mueller investigation as a "witch hunt" that has overlooked wrongdoing by Democrats.

Mueller has thus far obtained the indictments or guilty pleas of roughly 30 individuals, including four former Trump associates.

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 is on trial in Virginia in the first major courtroom test for Mueller's team.

Updated at 9:40 p.m.