" rel="tag">Donald Jr seen arriving at Manhattan apartment after being issued with ...

Donald Trump Jr has been spotted in New York after it was revealed he is the subject of a subpoena from the Senate Intelligence Committee, a panel led by Republicans.

The president's eldest son was seen arriving home in Manhattan on Thursday afternoon. 

Two Secret Service vehicles accompanied Trump Jr and a lead agent followed closely behind as he walked into his apartment. 

The subpoena has been an unexpected escalation of tensions between Congress and the First Family.    

Donald Trump Jr has been spotted in New York after it was revealed he is the subject of a subpoena from the Senate Intelligence Committee, a panel led by Republicans

Donald Trump Jr has been spotted in New York after it was revealed he is the subject of a subpoena from the Senate Intelligence Committee, a panel led by Republicans

The president's eldest son was seen arriving home in Manhattan on Thursday afternoon

The president's eldest son was seen arriving home in Manhattan on Thursday afternoon

A source with knowledge of the situation confirmed to DailyMail.com on Wednesday afternoon that the subpoena was received 'a few weeks ago.' The source wouldn't provide other details. 

The Axios news website first reported the committee's demand, and suggested it is related to the ill-fated Trump Tower Moscow, a 2015-2016 real estate venture helmed by President Donald Trump's former attorney Michael Cohen. 

The Washington Post quoted a person familiar with the subpoena saying it 'exasperated' Trump Jr. 

Cohen reported to federal prison on Monday to serve a three-year sentence for fraud and for lying to Congress in November about how long into the 2016 presidential campaign the project survived.

Trump Jr testified about the proposed skyscraper in a closed 2017 Senate Judiciary Committee session. A transcript released later shows that he claimed to have been only 'peripherally aware of it' and knew 'very little' about its progress. 

Democratic Sen Richard Blumenthal declared on Thursday that Trump Jr should go to jail if he doesn't comply with the subpoena. 

Two Secret Service vehicles accompanied Trump Jr as he arrived at his apartment

Two Secret Service vehicles accompanied Trump Jr as he arrived at his apartment 

A lead agent followed closely behind Trump Jr as he walked into his apartment on Thursday

A lead agent followed closely behind Trump Jr as he walked into his apartment on Thursday 

'The subpoena should be enforced,' he said, according to The Hill. 'If he refuses to obey it, he should be locked up.'  

'There are no privileges for Donald Trump Jr. The son of the president doesn't have any of those privileges.' 

Blumenthal said Trump Jr gave a 'number of responses' during his testimony that 'are challengeable based on the truth'. 

'I was in the room and my clear impress was that his answers were deliberately misleading and false,' Blumenthal added. 

'He said he was only peripherally aware of the negotiations in Moscow for Trump Tower when apparently he was briefed extensively.' 

Special Counsel Robert Mueller's report found that Trump Jr had 'served as the primary negotiator on behalf of the Trump Organization' when it was discussing to build a development in Moscow with the Crocus Group in 2013 and 2014. 

Trump looked downcast as he made his way back home. The subpoena has been an unexpected escalation of tensions between Congress and the First Family

Trump looked downcast as he made his way back home. The subpoena has been an unexpected escalation of tensions between Congress and the First Family

It states that Michael Cohen, Trump's former lawyer, also discussed the project with Trump Jr in 2015.   

Republican chairman Richard Burr and ranking Democrat Mark Warner of Virginia are known as bipartisan operators.  

They have run their own Russia-related investigation in parallel with Mueller's probe.

Burr's move is being viewed in Washington as a contrast to Senate Majority Leader Mitch McConnell's call for all of Washington to stand down and treat Trump-Russia scandals as things of the past.

A second source, one close to Trump Jr, told DailyMail.com shortly after the news broke: 'Don is a private citizen, who has already been cleared by Mueller after a two-year investigation. He has done 8-9 hours of testimony in front of Senate Intel already and 27 hours of testimony in front of various committees in total.'

The subpoena is related to the ill-fated Trump Tower Moscow, a 2015-2016 real estate venture helmed by President Donald Trump's former attorney Michael Cohen, which Trump Jr testified about back in December (pictured)

The subpoena is related to the ill-fated Trump Tower Moscow, a 2015-2016 real estate venture helmed by President Donald Trump's former attorney Michael Cohen, which Trump Jr testified about back in December (pictured) 

Senate Intelligence Committee Chairman Sen Richard Burr, a North Carolina Republican, signed off on the subpoena

Senate Intelligence Committee Chairman Sen Richard Burr, a North Carolina Republican, signed off on the subpoena

'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 insider added. 

'Don continues to cooperate by producing documents and is willing to answer written questions, but no lawyer would ever agree to allow their client to participate in what is an obvious PR stunt from a so-called "Republican" Senator too cowardly to stand up to his boss Mark Warner and the rest of the resistance Democrats on the committee.' 

Axios speculated that the subpoena is an indication that Trump Jr 'declined a request to appear' for more testimony.

Cohen told the House Oversight Committee in February that he briefed the president's eldest son and Ivanka Trump at least 10 times about Trump Tower Moscow.

PREV Ron DeSantis slams liberal New York and California for doing nothing about the ... trends now
NEXT In news vacuum, rumours and concern swirl over Catherine mogaznewsen