From time to time laws are created that favor one group over another. What defenses could you make to chall?

Marleen: From time to time laws are created that favor one group over another. What defenses could you make to chall?
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From time to time laws are created that favor one group over another. What defenses could you make to challenge these laws? Does the national constitution offer any remedies to help you challenge these laws and how so?

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Answer by Mutt
It would depend on the law, and what type of groups the law was written for. But, in general, the Equal Protection Clause of the 14th Amendment may help.