[TexasNative2000]

"There has to be some kind of penalty for this sort of thing"

No, not really.

He's not in your party anymore. He's not subject to your rules, discipline, or crying.

Pound sand.

[normy]

“There has to be some kind of penalty for this sort of thing,” said Martha Aasen, a delegate from Westport, Conn.

He could penalize you by caucusing with the Republicans