Republican members of the House Oversight and Government Reform Committee balk at the refusal. Democrats say Congress should focus on the health of the people.

The House Oversight Committee completed another deposition of a former Biden aide in its investigation into allegations of a cover-up of the former president's mental acuity.

The House Oversight Committee has requested interviews with several of Biden's former White House aides in light of a reports questioning his mental fitness in his final year in office and alleged efforts by those around him to conceal it -- allegations Biden has vehemently denied.