So Barry Loudermilk wants to charge her with witness tampering because he says Cheney persuaded Cassidy Hutchinson, and maybe others, to lie about interactions regarding Trump. Loudermilk says her first 2 talks with the committee she did NOT say Trump wanted so badly to go the Capitol that he lunged at the driver, she only said that AFTER meeting with Cheney and being persuaded to lie.
Note, as already stated we already know why her testimony changed, because she fired the Trump paid lawyer who was telling her NOT to talk to them. The part about Trump lunging at the driver was one of the specific stories the Trump lawyer told her NOT to tell the committee.
Lowdermilk is specifically citing her but saying there's another witness they think was tampered with in a similar fashion