Mike Donilon, former senior adviser to Joe Biden, testified before the House Oversight Committee Thursday morning that he had no knowledge of the Biden administration’s use of the autopen.

Appearing before the House Oversight Committee for its sprawling investigation into the former president’s inner circle and his mental acuity, Donilon stood by Biden’s fitness for office and claimed his communication skills “got stronger” during his one-term presidency, according to a source familiar with his testimony.