That is exactly why he can’t do it.
After doing a little research it does not appear that the USSC allows sore loser laws to stand in presidential elections.
You can be sure it would make it to the Supreme Court.
Trump is just blowing smoke up everyone’s ass....he can’t even run a campaign in the primaries...it’s startign to come unglued..how the hell does anyone think he has the ability to put together a third party campaign in all 50 states..also..he won’t waste the millions it would cost him..