As a practical matter, what if the Supreme Court puns on this and leaves it up to the states two states now and counting, the math can be pretty clear for Trump‘s ability to win a national election. That said, I don’t think the states have any business whatsoever in deciding who a private political party chooses to Put or not put on their ballot. The Republican party is not a state or federal agency
If the SCOTUS does not shoot down the lawlessness of dem states who remove Trump, the only avenue that remains for republicans would be for republican run states to remove any and all democrat candidates. If they don't, the controlled opposition (republican party) will be even more controlled by the democrat party. When an opposition party in a republic is allowed to dictate who can run against them, the result is a failed constitutional republic. I.e., we are witnessing our constitutional republic turning into a banana republic. God help us!
Here's a pun: you, are a dope.