Politics is not a sport, and heaven help me, I cringe at using sports metaphors for elections. But in this case, the metaphor is apt.
The unspoken ground assumption of checkers is “we are playing checkers.” If somebody pulls a knife during a game of checkers, then it’s not checkers anymore.
Can our legal system handle this? Possibly: the legal groundwork is there. But the law is not crystal clear, and with a nakedly partisan and corrupt Supreme Court….
/end