You are following White House talking points, just like Kevin McCarthy, but they are wrong. There is no requirement under the Constitution, House rules, or House precedent that the whole House vote before proceeding with an impeachment inquiry. The White House has no legal justification for refusing to comply with a subpoena. Attorneys for Trump are arguing that a sitting president is immune from any criminal process of any sort. As I said before, Republicans will regret not speaking out against that one day.