END OF THE SECRET BALLOT

The current bill could end the secret ballot in labor elections; a union would be recognized if 51% of the workers signed cards asking for one. Opponents say that would leave workers open to intimidation by labor organizers.

RAPID ARBITRATION

Once workers vote for a union, the law would mandate binding arbitration if the two sides can't agree to a contract after 120 days. Business fears that would hand government-appointed negotiators too much sway over work rules and pay.

Data: BusinessWeek