From Politico:

Congressional investigators are preparing to seek testimony from John Eastman, the attorney who crafted a legal strategy to help Donald Trump try to overturn the 2020 election results on Jan. 6, a House aide confirmed on Tuesday night.

The chair of the Jan. 6 select committee, Rep. Bennie Thompson (D-Miss.), told The Washington Post on Tuesday that he anticipated subpoenaing Eastman, though the aide emphasized that the Claremont Institute lawyer could avoid a subpoena if he cooperated voluntarily.