White House communications director Hope Hicks is expected to appear before the House Intelligence Committee as early as Friday, according to a report published Monday.
The House committee plans to quiz the longtime Trump aide about any contact campaign associates may have had with Russian operatives, multiple sources told CNN.
Hicks is also likely to be questioned about her involvement in drafting a statement addressing a controversial June 2016 meeting between Trump's eldest son Donald Trump Jr., White House adviser Jared Kushner, former campaign manager Paul Manafort, and Kremlin-linked lawyer Natalia Veselnitskaya.
This comes after Trump Jr. told congressional investigators in December he did not directly contact his father for help crafting a response to reports about the controversial Trump Tower meeting, but instead went to Hicks.
Ex-White House chief strategist Steve Bannon and former campaign manager Corey Lewandowski are also due to testify before the panel this week.
Hicks was probed by special counsel Robert Mueller in December as part of his investigation into Russian meddling in the 2016 election and whether the Trump administration obstructed justice by firing ex-FBI Director James Comey in May.
Hicks' attorney and a spokesman for Rep. Adam Schiff, D-Calif., the committee's ranking member, declined to comment to CNN. Hicks and Rep. Mike Conaway, R-Texas, the Republican leading the probe, did not respond to media inquiries.