The President was guilty over a year ago when his obstruction was revealed in the Muller report. His behavior has only continued in that vein. As for the current situation the Constitution is quite clear the House of Representatives has the sole responsibility for impeachment. The President does not have the option of not cooperating with them. PERIOD You don’t need an order from the SCOTUS, the Constitution doesn’t say anything about that. In the end, this comes down to the Rule of Law. The GOP has shown they no longer support the Constitution. They should all resign.