Although I can't believe that Biden will be allowed to be sworn-in, Q did say that if Clinton had won, Patriots were prepared to do the unthinkable. Plan Z. I can only assume that is still on the table in regards to Biden.
I believe it is Justice Department 'policy' that a sitting president can't be indicted. In an extremely dire situation like the country is in right now, such a policy might be ignored, especially if an entity not part of the Justice Department is involved. For example, the Department of Defense.