No reason for them to pull out of it. As I have said before, politically, I don't think a No Vote will be a bad thing for Labor. They get to play the "We tried card"and no one is changing their vote based on them trying.
So - in fact it may strengthen the voters behind Labor, rather than being spread out in various other factions.
The Labor No voters may still vote Labor, despite voting No against the referendum. The extreme right will never vote Labor, so no loss there.
