If the U.S. Congress passed a minimum wage law at $15 per hour, could California set its minimum wage at $12 per hour? Could California set its minimum wage at $20 per hour?

The Constitution

 

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If the U.S. Congress passed a minimum wage law at $15 per hour, could California set its minimum wage at $12 per hour? Could California set its minimum wage at $20 per hour? Why or why not on both questions. Please provide the legal basis for your answer. To receive credit, you must post a thoughtful, well-worded response of at least 5 sentences.