That was her thesis presented to the us socialist party along withCLR James and it was rejected because it contradicted Trotsky but his wife accepted. After she became a Hegelian CLR James decided to end the partnership
I think there’s a misprint in your post. You must have meant the SWP, the mainline Trotskyist party there which still imagines that the former USSR was some sort of “degenerate worker’s state”. It was certainly “degenerate” and a “state” but its only link with “workers“ was that it exploited and oppressed then.