Biden White House Dr. Kevin O'Connor has invoked his Fifth Amendment rights in deciding not to comply with a House subpoena to give scheduled, closed-door testimony Wednesday morning as part of the GOP-led chamber's probe into Biden’s mental acuity and whether his inner circle tried to conceal a cognitive decline from the public. O'Connor is among several members of Biden's inner circle being called to testify on the matter. “On the advice of his legal counsel, Dr. O’Connor refused to...