He Must Be Impeached…
Not because he incited an insurrection, but because he is, beyond all doubt, the most popular political figure in the United States today.
Unless they impeach him, there will likely never be anyone who can beat him as nominee for President for the Republican Party. It is also likely that there will never be an uncontested presidential election again in the United States.
He must be impeached not for a crime, but because there is literally no other way to drive him out of politics.
It is as simple as that.