Donald Trump impeachment

This story about him firing James Comey is getting more juicy. Future ex President Trump asked Mr. Comey to end the Flynn investigation. The FBI director has been called to testify. There is already an investigation by a special prosecutor, FBI and Congress into Comey firing. If it has been determined power of abuse the Congress is going to reinstate Mr Comey job and Trump will most likely be impeached. A President can fire a FBI director but since Nixon case the process has changed to stop abuse of power. Can you say goodbye TRUMP?