A contentious measure that would make Missouri the 26th right-to-work state will soon be up for an expected veto.
Gov. Jay Nixon on Thursday is set to take action on the bill alongside United Auto Workers members near Ford's Kansas City Assembly Plant.
The measure would prohibit workplace contracts that require union fees to be collected from nonmembers. Supporters say the legislation would attract businesses and spur economic growth.
Nixon has criticized the bill, which he said could lead to lower wages. Other opponents have said it could undermine unions.
It's unclear whether there's enough support in Missouri's Republican-led Legislature to overturn an expected veto by Nixon.
The measure passed both the House and Senate with less than the needed two-thirds majority for an override.