A nnie Tomasini on Friday became the third Biden administration official to plead the Fifth Amendment in a House panel's investigation into former President Joe Biden's mental fitness and use of a presidential autopen while in office. Tomasini was called on to appear before the Republican-led House Oversight Committee for a closed-door interview.

Former top Biden aide Annie Tomasini is the latest ex-White House official to appear in the House Oversight Committee's probe. She pleaded the Fifth on Friday.

As the GOP probe into Biden’s mental acuity and use of an autopen expands, a growing number of his top aides are being swept up in a thorny legal predicament.