The Biden campaign is reportedly worried shirtless (I am cleaning that up a bit) about third-party candidates, feeling that they would take more votes from Biden than from Trump--and especially in important swing states.
If they are merely worried--even a great deal--there is certainly nothing wrong with that.
But if they intend to do something illegal--or even ethically questionable--to keep a third-party candidate off the ballot in some swing states, that is another matter, entirely.
Thoughts?