"Despite what you hear from liberals, it will take money out of people's pockets," Greitens said.
Cities all over the country have been boosting their minimum wage. It's up to $15 an hour in Seattle, but it's going in the opposite direction in St. Louis.
But after nationwide protests, the minimum wage went up on July 1, or will go up soon -- from Chicago to Flagstaff, Arizona, and Los Angeles to Washington, D.C.
Wanda Roberts, a minimum wage worker in St. Louis, said the new $10 wage brought in an extra $400 a month and helped the local economy.
"If we're making $10 an hour, we're going to go right back out and spend that money," Roberts said.
And now that it's being reversed, she says she would "go back to struggling."
"Trying to worry about how I'm going to pay my rent, how I'm going to pay my bills and how I'm going to have money left over to buy household supplies and food," she added. In St. Louis, the minimum wage was going to increase to $11 an hour in January. Now, that won't happen. And by one estimate, 38,000 workers could miss out on a raise.