Andrew C. McCarthy has written perhaps the definitive analysis of impeachment: the reasons the framers included it, the intended uses for it, the serious unintended consequences of playing politics with it, and much more. It should be required reading for all congressional Democrats, but you know they’ll avoid it like the plague --- while enthusiastically infecting our system of government with their own plague of sorts. The only remedy we have for their partisan stupidity is to vote their butts out of office.
The book he wrote dealing with this is called FAITHLESS EXECUTION, which maintains that the system of checks and balances has broken down, “with no repairs on the horizon.” The article at the link needs no embellishment from me. Read it and be wiser.