It is easy to find a replacement for Comey. There are both centrist Rs and libertarian Rs and Nativist Rs and all kinds of Rs qualified to fill FBI director.
Of Course Comey has many years left on a fixed 10 year term. He cannot be fired by Trump. It is unlikely Congress has the spine to even consider impeachment.
It is not easy to find a replacement for Paul Ryan. I suggest Newt Gingrich is probably the closest to a good replacement. After all, the Speaker need not be a Congressman.
For weeks I’ve opinions run the gamut from “Trump can fire Comey any time, there is precedent” to “Trump absolutely cannot fire Comey unless he’s committed a crime.”
I hope someone reading the thread (hostage maybe? Other?) knows for sure. A lot of opinions are held by people who sound very confident, yet they can’t all be true.