The Soviet Union would remain a one-party nation even if an opposition party were permitted -- because everyone would join that party.

I didn’t leave the Democratic Party. It left me.

We're the party that wants to see an America in which people can still get rich.

We're the party that wants to see an America in which people still can get rich

If the Soviet Union let another political party come into existence, they would still be a one-party state, because everybody would join the other party.

The Bridge to Nowhere.