Ben Franklin opined about impeachment. The threshold consistent "high crimes and misdemeanors" was properly described with another word Franklin used- "obnoxious". Trump's actions in office fit the meaning of "misdemeanors" that existed at the time of writing the Constitution. Funny how "Patriots" are either ignorant of or willfully distract or lie regarding that point. The reason that impeachment was included as an option for Congress was to provide an alternative which Franklin mentioned as the alternative, assassination, to correct a grievous abuse of office. Since killing a President was never off the table in principle then I doubt the Founders expected any President immune from criminal consequences in office or not. That there is no hint of protection supports that, unless as I say killing is the preferred route if impeachment is impossible.
Why is it that the supporters of Trump are generally the most ignorant regarding the Founders, Constitution and the rule of law? Those who are critical are anti-American in supporting these three most important foundations of our nation and gleefully piss on them whenever they conflict with their Dear Leaders and politburo.