Donald Trump has admitted for the first time that his son met a Kremlin-connected lawyer in 2016 to collect information about Hillary Clinton, but insists the meeting was legal.

Iran Press/ America- In one of a series of Sunday morning tweets issued in apparent reaction to a CNN report, the US president wrote:  "Fake News reporting, a complete fabrication, that I am concerned about the meeting my wonderful son, Donald, had in Trump Tower. This was a meeting to get information on an opponent, totally legal and done all the time in politics – and it went nowhere. I did not know about it!”

That explanation differs entirely from one given by Trump 13 months ago, when a statement dictated by the president but released under the name of Donald Trump Jr  read: “We primarily discussed a program about the adoption of Russian children that was active and popular with American families years ago.”

The 2016 meeting is pivotal to the special counsel Robert Mueller’s Russia collusion investigation, though Trump’s tweets appeared aimed at conveying the message that he is not worried about Donald Trump Jr’s exposure to the inquiry.

He made the remarks as one of his lawyers warned the special counsel against trying to force the president to be interviewed.

Trump has launched a series of new public attacks on Robert Mueller and his team in recent weeks, which has been interpreted as possible signs the president is anxious about the inquiry reaching his family. 

Trump, who is currently ensconced at his Bedlington, New Jersey, golf course for an 11-day “working holiday”, has a decision to make over whether to sit for an interview with Mueller – or risk being issued a subpoena.