Senior White House adviser Jared Kushner is denying that President Donald Trump's campaign colluded with Russia, saying in a statement ahead of congressional interviews that he has "nothing to hide."

The 11-page statement provided to the press on Monday details four contacts with Russians during Trump's campaign and transition. Mr Kushner plans to deliver the statement during closed-door meetings with investigators on the Senate and House intelligence panels this week.

Mr Kushner is meeting with staff on the Senate committee Monday and lawmakers on the House committee Tuesday as part of both panels' investigations into Russian meddling in the 2016 campaign and possible links to the Trump campaign.