Kevin O’Connor, who served as President Biden’s physician during his term, asked the House Oversight Committee Saturday to postpone scheduled testimony over disagreements on the scope of the questions the Republican-led committee can ask him.

O’Connor is scheduled to give a deposition on Wednesday as part of the committee’s probe into Biden’s mental acuity and his use of an autopen signing device. In a letter to Rep. James Comer (R-Ky.), the chair........

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