Stephen Bannon and Corey Lewandowski are scheduled to testify in the coming week as the House Intelligence Committee’s investigation of possible Russian interference in the 2016 election reaches a crescendo.

President Donald Trump’s former chief strategist and former campaign manager, respectively, are part of a hectic schedule that Democrats fear is being engineered by Republicans keen to end the probe as soon as possible. Their appearances are voluntary, and they’ll meet with the panel in private, said officials from both parties familiar with the committee’s schedule.

Congressional interviews also were being sought for next week with U.S. Federal Bureau of Investigations officials and a former top Department of Justice official. Some of those are expected to occur before the Intelligence committee, while others as part of a separate House probe into FBI handling of the Hillary Clinton email case in 2016.

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