Should, but won't. The Messiah can do no wrong, don't cha know.
Even being indicted would not prevent him from taking office. There is no requirement in the Constitution that the President not be a criminal.
Now if he'd indicted, it's possible that a few (more) electors will have second thoughts, and vote for Some Other Democrat. Maybe the Secretary of State Designate? After all, she has a built in replacement, ol' Billy Jeff. (Precedent for that is Robert Kennedy as Attorney General under his brother John. )
The only difference might be that more of the country's secrets get sold off to the Chinese, rather than to various Muslim countries and "movements".
LOL Matthews is lamentating.