I doubt you"ll win a DFR claim over the union being ill-prepared.
And yes, while it is a grave responsibility that the leadership has, you guys voted to allow the union to take whatever actions were necessary, up to and including self-help.
At least with Obummer, we get a chance to re-validate his employment contract. Because there was no drop-dead on your vote, there's not much recourse aside from decertification. I don't think there's a ballot initiative in the TWU's constitution which would allow you guys to re-vote.