In his written responses to special counsel Robert Mueller, President Trump said campaign adviser Roger Stone did not tell him about WikiLeaks and he wasn’t made aware of a June 2016 meeting at Trump Tower between his son and a Russian lawyer promising dirt on Hillary Clinton, a report said Wednesday.

The president’s answers were sent to Mueller last week and a source described them to CNN without providing any direct quotes, but said Trump emphasized that he was responding to the best of his recollection.

The meeting at Trump Tower between Donald Jr., Jared Kushner and then-campaign manager Paul Manafort and a Kremlin-connected lawyer who said she had information that could hurt Clinton’s presidential campaign could be central to Mueller’s investigation into whether Trump campaign associates colluded with the Russians.

So would any information about Stone’s connection to WikiLeaks and its founder, Julian Assange.

WikiLeaks dumped thousands of emails that Russian hackers stole from the Democratic National Committee and the Clinton campaign during the summer of 2016.

Mueller’s prosecutors are investigating whether Stone, a self-described dirty trickster and longtime Trump ally, knew ahead of time that WikiLeaks would release the trove of emails.

Stone, who has admitted being in contact with an Assange intermediary during the campaign, denied having any advance warning about the releases.

“I can honestly say that candidate Trump, Donald Trump, President Trump and I have never discussed the WikiLeaks disclosures before, during or after the election. Not a single one,” Stone told MSNBC in an interview in March.

Trump has also steadfastly insisted he was never in contact with WikiLeaks or Assange.

In congressional testimony, Donald Jr. said he didn’t inform his dad of the Trump Tower meeting and said he agreed to meet the Russian lawyer to see what she had to say.