"In my view, there is no attorney-client privilege that protects a discussion between father and son", Schiff said.
The Trump Tower meeting is a matter of keen interest to special counsel Robert Mueller, who is also investigating the meddling and whether there was any obstruction of justice.
In a statement to the Senate Judiciary Committee in September, Trump Jr said the meeting was less than half and hour long. Trump's conversations with a White House lawyer might be covered by executive privilege, but that wouldn't extend to a conversation with his son about nonofficial acts.
The Russian lawyer who attended the infamous Trump Tower meeting denied interacting with the founder of Trump dossier research firm Fusion GPS that same day, in direct contradiction to what the opposition researcher told Congress last month.
Instead, Trump Jr. said he was speaking to Hicks - now the White House communications director - about how to respond to the reports. Schiff added that he did not believe one could "shield communications between individuals merely by having an attorney present".
Goldstone's email described the story as "eerily weird", but a source downplayed the interaction to CNN.
The conversations that Trump Jr. may have had with his father after the June 2016 meeting are of interest to investigators primarily due to the fact that the younger Trump went into this meeting on the presumption that the Russian lawyer he would be meeting with had connections to the Russian government and that the goal of the meeting was to discuss potentially damaging information about Hillary Clinton. The person was not authorized to speak about the testimony and asked not to be identified.
In another email, Goldstone shared a story on Russia's hacking of Democratic National Committee emails with his client, Emin Agalarov, and Ike Kaveladze, who attended the meeting as well.
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Donald Trump, Jr. greets his father at a town hall debate at Washington University on October 9, 2016 in St Louis, Missouri.
In that interview, Trump Jr. cast the 2016 meeting as simply an opportunity to learn about Clinton's "fitness, character or qualifications", insisting to investigators that he did not collude with Russian Federation to hurt Clinton's campaign.
The question, though, is whether the House Republicans who control the committee will agree with this demand.
Trump Jr first called it a "short introductory meeting" focused on a Russian adoption program. Jared Kushner and Paul Manafort were also in attendance, as were a Russian lobbyist, a Russian businessman and a translator. Trump Jr. has said he did not follow up on the meeting. He also asked the site about a rumor about an upcoming leak, and tweeted a link that the account sent him.
"Now that I know the kind of apocalyptic Hollywood scenario that a private conversation between a lawyer and a businessman can be turned into, I very much regret that the desire to bring the truth to the [Congress] has thrown the US president's family, as well as Mrs. Clinton, into the whirlwind of mutual political accusations and fueled the fire of the morbid, completely groundless hatred for Russia", Veselnitskaya wrote. "He acknowledged discussing that meeting with his father".
Prince denied that assertion in the interview.
Though the intelligence committee does not generally release transcripts of interviews, lawmakers agreed to do so in negotiations with Prince.