Confrontation Clause

Since the beginning of the impeachment proceedings against the President, Donald Trump has insisted he has a right to confront “the whistleblower,” the anonymous member of the intelligence community who set the whole thing in motion. There is a Confrontation Clause in the Sixth Amendment of the United States Constitution, which says a defendant in a criminal case has the right to face their accuser. But does this clause apply to the impeachment hearing against a president in Congress?