A former aide to President TrumpDonald John TrumpShocking summit with Putin caps off Trump’s turbulent Europe trip GOP lambasts Trump over performance in Helsinki Trump stuns the world at Putin summit MORE said Wednesday that it's "probable" that President Trump's eldest son Donald Trump Jr.Donald (Don) John TrumpJuan Williams: Putin wins as GOP spins Trump Jr. mocks the 'resistance' over 'baby blimp' in London Mueller: Russian officers launched leaks website in June 2016 MORE told his father about a controversial meeting with a Russian lawyer in 2016. 

"I think it's probable that that meeting with Don Jr. – I am sure Don Jr. reported to his father what they had heard," the former aide, Sam Nunberg, said on MSNBC. "I don't think there's anything wrong with that, by the way."

Trump Jr. accepted the meeting with Russian lawyer Natalia Veselnitskaya in June 2016 after he was told that she had damaging information about his father's then-opponent, Hillary ClintonHillary Diane Rodham ClintonShocking summit with Putin caps off Trump’s turbulent Europe trip GOP lambasts Trump over performance in Helsinki Trump stuns the world at Putin summit MORE

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Nunberg no longer works for Trump, and has previously admitted to fabricating stories to the news media. 

The June 2016 meeting in Trump Tower has been the subject of much controversy because of the ongoing investigation into Russia's role in the 2016 election and whether the Trump campaign conspired with Moscow to sway the presidential race.

President Trump has denied that he was told about the meeting at the time, and Donald Trump Jr. has said that he never relayed the information to his father because the meeting did not amount to anything.  

A book published in January by New York media writer Michael Wolff quotes former White House chief strategist Stephen Bannon as saying that the Trump Tower meeting was "treasonous" and that Trump was almost certainly aware of the encounter.

“The chance that Don Jr. did not walk these jumos up to his father’s office on the twenty-sixth floor is zero," Bannon said.