US President Donald Trump's son-in-law, Jared Kushner, faces two days of closed-door questioning from Congress this week as lawmakers try to determine whether Trump's campaign enlisted Russia's help to win the White House in last year's election.

Kushner, a senior White House adviser, is expected to face questions about his contacts with Russian citizens and officials when he testifies before the Senate Intelligence Committee on Monday and the House of Representatives Intelligence Committee on Tuesday.

Trump has been dogged by allegations that his campaign aides worked with Russia, which U.S. intelligence agencies have accused of interfering in last year's election. The issue has dominated Washington and divided his White House, distracting from his efforts to overhaul healthcare, restructure the tax code and rebuild the nation's crumbling infrastructure.

Moscow has denied any interference, and Trump says his campaign did not collude with Russia.

Trump's son Donald Trump Jr. released emails earlier this month that showed he appeared to welcome the prospect of damaging information from the Russian government about Trump's Democratic rival, Hillary Clinton.

Members of both committees say they are eager to hear about the June 2016 meeting involving Russian lawyer Natalia Veselnitskaya. Trump's son, Kushner and former Trump campaign manager Paul Manafort all participated in the meeting.