https://naturalborncitizen.wordpress.com/

If this happens, the person ousted is not considered to have ever been President. The wrongful election is void. That’s the difference between quo warranto and impeachment. The law removes a legally sworn in President by impeachment for conduct while in office.

But the law removes an illegally sworn in person by the statutory Writ of Quo Warranto, regardless of conduct. I promised further research...