Roger Stone speaks after his appearance at Federal Court in Fort Lauderdale, Fla., Jan. 25, 2019.
Roger Stone speaks after his appearance at Federal Court in Fort Lauderdale, Fla., Jan. 25, 2019.

WASHINGTON - Roger Stone, a long-time friend and adviser to U.S. President Donald Trump, said Sunday he would consider cooperating with special counsel Robert Mueller's investigation into Russian meddling in the 2016 election and discuss his conversations with the U.S. leader.

Stone, charged last week with lying, obstruction and witness tampering in connection with Trump's campaign, told ABC's "This Week" show, the extent of his cooperation with Mueller's 20-month probe would be something he would "have to determine after my attorneys have some discussions."

He added, "If there’s wrongdoing by other people in the campaign that I know about, which I know of none, but if there is, I would certainly testify honestly.”

The 66-year-old Stone, arrested in a pre-dawn FBI raid Friday on his Florida home, has denied wrongdoing, saying hours after his apprehension, "I will plead not guilty to these charges, I will defeat them in court. I believe this is a politically motivated investigation."

Former campaign adviser for President Donald Trump,  Roger Stone walks out of the federal courthouse following a hearing, Jan. 25, 2019, in Fort Lauderdale, Fla.
Roger Stone, Former Trump Campaign Adviser, Arrested
Roger Stone, a former campaign adviser to U.S. President Donald Trump, was released on a $250,000 bond Friday, hours after being arrested on several criminal charges stemming from the special counsel's investigation of Russian interference in the 2016 U.S. national election.Greatest Witch Hunt in the History of our Country! NO COLLUSION! Border Coyotes, Drug Dealers and Human Traffickers are treated better. Who alerted CNN to be there?— Donald J.

As he left court Friday after posting a $250,000 bond to secure his freedom pending trial, Stone said, "I have made it clear that I will not testify against the president, because I would have to bear false witness against him."

Stone told ABC that if he cooperates with Mueller, "I’d also testify honestly about any other matter, including any communications with the president. It’s true that we spoke on the phone, but those communications are political in nature, they’re benign, and there is certainly no conspiracy with Russia.”

Stone said he never discussed cooperation with Russia with Trump.

"Everything that I did... is constitutionally protected free speech. That is what I engaged in - it is called politics," Stone said.

Roger Stone speaks after his appearance at Federal Court in Fort Lauderdale, Fla., Jan. 25, 2019.
Who Is Roger Stone? 
Roger Stone, the Republican political operative indicted Friday by the grand jury investigating Russian election interference, is a longtime friend and confidante of President Donald Trump who helped pave the way for the real estate mogul’s unforeseen ascent to the White House.A self-described “dirty trickster” with a taste for loud suits and colorful language, Stone, 66, has known Trump since the late 1970s when Stone, a young veteran of Richard Nixon’s 1972 re-election team, was campaigning for…

Stone is the sixth key figure in Trump's orbit to be accused of criminal offenses as a result of the Mueller investigation. Five men - former Trump campaign chairman Paul Manafort, campaign aide Rick Gates, foreign policy adviser George Papadopoulos, one-time national security adviser Michael Flynn and former personal attorney Michael Cohen — have pled guilty or been convicted of various offenses.

Papadopoulos served a short jail term, while Cohen has been sentenced to three years in prison and ordered to turn himself in in early March. Manafort, Gates and Flynn are awaiting sentencing.

After Stone's arrest, Trump sought to distance himself from his one-time aide, saying on Twitter, "Roger Stone didn’t even work for me anywhere near the Election!"