The committee is one of the few in the Senate that has been conducting serious investigations related to Russian meddling in the 2016 USA presidential election.
The development, first reported by Axios, marks the first congressional subpoena of President Donald Trump's immediate family to be made public.
"When he originally agreed to testify in front of the Senate Intel Committee in 2017, there was an agreement between Don and the Committee that he would only have to come in and testify a single time as long as he was willing to stay for as long as they'd like, which Don did", the statement from the source read.
In an interview with Fox News' Laura Ingraham in January 2019, Trump Jr downplayed his knowledge of the discussions about a possible Trump Tower in Moscow, saying that the project was a creation of President Trump's former attorney Michael Cohen: "We don't know anything about it". Trump Jr.in the hearing said he was "peripherally aware" of the potential project.
He testified before the committee in 2017 about his participation in a June 2016 meeting at Trump Tower with Russians offering "dirt" on Hillary Clinton.
Trump Jr. had no immediate comment.
It was the first known legal summons issued by Congress to a member of the president's family to force testimony in the ongoing investigation, and comes after Special Counsel Robert Mueller declined to accuse Trump's 2016 campaign of criminal conspiracy to collude with the Russians.
A Senate Intelligence Committee spokeswoman declined to discuss details of its long-running investigation into allegations of Russian meddling in the 2016 United States presidential election.
But he later tweeted that all Veselnitskaya wanted to talk about was adoption policy and an anti-Russian U.S. sanctions law. Ken Dilanian, an NBC reporter, wrote on Twitter that Senate investigators want to ask Trump Jr. about Trump Tower Moscow.
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