House Minority Leader Kevin McCarthy has entered dangerous new territory in warning telecom companies not to comply with lawful requests from the House committee investigating the Jan. 6 assault on the Capitol. McCarthy’s threat that his party “will not forget” if the companies comply sounds more like something from a Mafia thug than a political leader. An ethics probe into that threat is warranted — as are some hard questions about what potential revelations, exactly, McCarthy and his party are so afraid of. Jan. 6 saw an unprecedented attack upon America’s seat of government, with loss of li...