Twitter’s top executive will tell a House panel on Wednesday that the social media platform doesn’t discriminate against political ideologies, once again rebutting a report that the company “shadow banned” conservative users.

“We believe strongly in being impartial, and we strive to enforce our rules impartially,” Twitter founder and Chief Executive Officer Jack Dorsey said in written testimony released prior to his appearance before before the House Energy and Commerce Committee. Its members are certain to question him again over accusations that the platform suppressed posts from House Freedom Caucus Chairman Mark Meadows and other Republicans.