From the article:
By a 58-51 vote, the Republican-led House passed a bill that would ban workplace rules that make union membership a condition of employment for government workers. It then approved a second bill, covering private-sector workers, by a vote of 58-52.
and
The legislation would make Michigan — one of the most union-friendly states in the country — the 24th "right to work" state, making payment of union dues voluntary even though the union negotiates on a worker's behalf.
So can someone explain to me why 10,000 people showed up to protest the bill? What is the unions' argument against this legislation? How does this hurt the worker?