https://abcnews.go.com/Politics/wireStory/russia-probe-began-trump-called-spy-chiefs-62535349

"Two months before special counsel Robert Mueller was appointed in the spring of 2017, President Donald Trump picked up the phone and called the head of the largest U.S. intelligence agency. Trump told Mike Rogers, director of the National Security Agency, that news stories alleging that Trumps 2016 White House campaign had ties to Russia were false and the president asked whether Rogers could do anything to counter them.

Rogers and his deputy Richard Ledgett, who was present for the call, were taken aback."