They've always been psychotic wannabe tyrants, who secretly desire to engage in the same sorts of genocidal, authoritarian, power- drunk tactics that they falsely accuse Republicans of secretly planning.
Thankfully, their psychotic dream would never happen.
1. The odds of them ever gaining enough power to do that are slim to none.
2. As tritsofme bravely pointed out, such a plan would openly violate at least two Constitutional amendments and thus the Supreme Court would strike it down.
3. It would guarantee that every single official in favor of it would be run out of office in the next election, assuming they weren't impeached sooner than that.