I do not think there would be enough time to impeach our President. It would take years to collect all the reasons and then years to make a decision on which one to use for the process. In the mean time our government would continue to dissolve and he would appoint himself Dictator.
Unlikely to be impeached or convicted be cause it would be viewed as racist. More likely he will want to spend more time with his family or become more of a lame duck than he is now. His ego would not allow him to just resign. Have you ever thought about him declaring martial law when he loses power?