Just this year, Republicans in Missouri passed a preemption law to retroactively kill a minimum wage hike enacted by city leaders in St. Louis. Under the new law, no locality could have a wage floor higher than the one mandated by the state. As HuffPost reported in July, the new law had the effect of reversing St. Louis’ minimum wage, taking it from $10 to the current state level of $7.70.
Article source: https://www.huffingtonpost.com/entry/minimum-wage-raises-coming-to-18-states-on-new-years_us_5a440992e4b06d1621b6c0e1?utm_hp_ref=hawaii