Senior White House adviser Jared Kushner has denied that US president Donald Trump's election campaign colluded with Russia.
In a statement released ahead ahead of congressional interviews, the president's son-in-law said he has "nothing to hide".
His 11-page statement details four contacts with Russians during Mr Trump's campaign and presidential transition period.
Mr Kushner, who is married to Mr Trump's daughter Ivanka, plans to deliver the statement during closed-door meetings with investigators on US Senate and House committees this week.
"I did not collude, nor know of anyone else in the campaign who colluded, with any foreign government," Mr Kushner said in the statement, in which he also insists none of the contacts was improper.
He also denies that Russians finance any of his business interests in the private sector.
In speaking to Congress, Mr Kushner – as both the president's son-in-law and a trusted senior adviser during the campaign and inside the White House – becomes the first member of the president's inner circle to face questions from government officials as they probe Russian meddling in the 2016 election and possible links to the Trump campaign.
He is due to meet staff on the US Senate intelligence committee and politicians on the House intelligence committee.
His appearance has been highly anticipated, in part because of a series of headlines in recent months about his interactions with Russians and because, until Monday, he had not personally responded to questions about an incomplete security clearance form and his conversations with foreigners.
Mr Kushner said in the statement: "I am not a person who has sought the spotlight."
In it, he detailed a June 2016 meeting with a Russian-American lawyer and said it was such a "waste of time" that he asked his assistant to call him out of the gathering.
Emails released this month show that the president's son, Donald Trump jnr, accepted the meeting at Trump Tower with the idea that he would receive damaging information about his father's presidential rival, Hillary Clinton.
Mr Kushner said he had not seen those emails until he was shown them recently by his lawyers.
He said in his statement that Mr Trump jnr invited him to the meeting. He said he arrived late and when he heard the lawyer discussing the issue of adoptions, he texted his assistant to call him out of the room.
Mr Kushner's statement said: "No part of the meeting I attended included anything about the campaign, there was no follow-up to the meeting that I am aware of, I do not recall how many people were there [or their names], and I have no knowledge of any documents being offered or accepted."
Mr Kushner also denied reports he discussed setting up a secret back-channel with the Russian ambassador to the US.
He said he did speak with the Russian ambassador Sergey Kislyak in December at Trump Tower. But he said that conversation concerned policy in Syria.
Mr Kushner said when Mr Kislyak asked if there was a secure line for him to provide information on Syria from what Mr Kislyak called his "generals", Mr Kushner asked if there was an existing communications channel at the embassy that could be used.
Mr Kushner said he did not propose an ongoing secret form of communication.
He also said he met with a Russian banker, Sergey Gorkov, at the request of Mr Kislyak. But he said no specific policies were discussed.
Mr Kushner also explained that his application for a security clearance form was submitted prematurely due to a miscommunication with his assistant, who had erroneously believed the document was complete.
He said he mistakenly omitted all of his foreign contacts, not just his meetings with Russians, and has worked in the last six months with the FBI to correct the record.
Mr Trump jnr and Mr Trump's former campaign manager Paul Manafort, who was also at the June 2016 meeting, are scheduled to testify before the Senate Judiciary Committee this week.
Meanwhile, the president took to Twitter over the weekend to defend himself and repeat his criticism of the investigations.
On Sunday, Mr Trump tweeted: "As the phony Russian witch hunt continues, two groups are laughing at this excuse for a lost election taking hold, Democrats and Russians!"
