I am not sure any of the Dems have a conscience but they do have auto plants in states (mostly southern) where so-called Blue Dogs are exposed. Hammer them and I believe that some will take a walk or decide that maybe a secret ballot is the more American way of voting than at the dictates of a union thug.
FOCA is about abortion, not card-check. But you’re right, it’s hard to tell, with the Democrats being so thorough in their “Deception-in-Labeling” drive.