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Former Trump campaign manager Paul Manafort will also be questioned before the panel on July 26 as the committee attempts to unearth possible collusion with the Trump campaign. White House advisor and Donald Trump’s son–in–law, Jared Kushner, has agreed to appear before the Senate Intelligence Committee on Monday. The Russian lawyer at the centre of the scandal has also offered to testify to “clarify” what happened during the well publicised meeting.

Express Donald Trump Jr will testify before the Senate Judiciary Committee

The relationship between Donald Trump and Vladimir Putin, in pictures Wed, July 19, 2017 The relationship between Donald Trump and Vladimir Putin is under intense scrutiny as ties between the two leaders are being examined for possible illegal activity Play slideshow Mikhail Klimentyev/TASS 1 of 10 Russia's President Vladimir Putin (L) and US President Donald Trump talking during a bilateral meeting on the sidelines of the G20 summit in Hamburg

Natalia Veselnitskaya said: “I am ready to clarify the situation behind the mass hysteria, but only through lawyers or testifying in the Senate. “If the Senate wishes to hear the real story, I will be happy to speak up and share everything I wanted to tell Mr. Trump." The Senate Judiciary Committee is one of several congressional panels conducting an investigation into Russia.

Mr Kushner’s lawyer confirmed the meeting and said: “As Mr Kushner has been saying since March, he has been and is prepared to voluntarily cooperate and provide whatever information he has on the investigations to Congress. “Working with and being responsive to the schedules of the committees, we have arranged Mr. Kushner's interview with the senate for July 24. “He will continue to cooperate and appreciates the opportunity to assist in putting this matter to rest.” Congressional investigators are expected to focus on Mr Kushner's contacts with Russians during and immediately after the campaign, especially any failure to disclose such meetings.

GETTY The lawyer at the centre of the scandal is willing to clarify what happened

GETTY Robert Mueller has been appointed as head of the special counsel