I don't know about that.
If your enemy is in a hurry to jump off a cliff, why stand in his way?
You are assuming curtailing political speech is a loser for the Democrats.
Why join them to jump off the cliff at all?
A good majority of Millennials and the usual Useful Idiots agree with them that curtailing political speech is a great idea - because they bought the lie that corporations are not people and should not have rights and that money in politics SHOULD be abolished or limited.