Republican senators are urging Kamala Harris to testify before the House Oversight Committee as part of an investigation into allegations of a cover-up regarding Joe Biden's cognitive health. The committee, led by James Comer, has already questioned several former administration members and is considering issuing a subpoena for Harris. Some senators, including Roger Marshall, believe Harris's testimony could provide valuable insight, though Marshall claims Biden's health issues were apparent without further testimony. While Republicans emphasize the need for transparency and accountability, Democratic senator Richard Blumenthal argues that current economic and policy challenges are more pressing. The debate highlights ongoing partisan tensions over the investigation and calls for greater openness from former administration officials.