How does the Supreme Court limit states' consumer protection powers?

The Supreme Court can stop states from making too many rules to protect consumers, like when they try to make stores act fairly.

Imagine you and your friends are playing a game in your neighborhood, and you all agree on the rules, like how many times you can jump rope or how many turns each person gets. But then one of your neighbors says, "I'm going to change the rules just for my street!" That might not be fair to everyone else.

That's kind of what happens with states. Each state can make its own rules to help people, like saying stores can't trick you into buying things you don't need. But sometimes these rules are too different from one state to another, and that causes problems for big companies or even other states.

The Supreme Court acts like a referee in this game. If it thinks a state's rule is too unfair or gives too much power to people in that state, it can say, "Nope, we’re going to stop you from making that rule."

This is called judicial review, and it helps keep things balanced across the country, so no one state has too much control over how people are protected.