The prosecutor overseeing the Hunter Biden investigation is testifying before congressional investigators that he had the ultimate authority over the yearslong case. The closed-door interview on Tuesday marks the first time a special counsel is appearing before Congress in the middle of a probe. It comes as House Republicans are aiming to ramp up their impeachment inquiry into the president and his family after weeks of stalemate. Members of the House Judiciary Committee questioned David Weiss on allegations that was not the decision-maker in the case into the president’s son and that the probe was influenced by political pressure. A spokesperson for Weiss calls his testimony “unprecedented.”