The backlash may dim the Federal Police's star power.

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But if the federal government were considered to hold such a national police power, then the concept of enumerated, delegated powers to the federal level, with traditional government powers otherwise remaining with the states, would be obliterated.

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That is why the Supreme Court has always ruled that the police power belongs to the states and not the federal government.

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Several groups of New Orleans Police Department employees are under federal investigation, accused of abuse of power -- including murder charges.

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Arizona's governor signed a bill that gives local police the power to clamp down on illegal immigration, which is a federal responsibility.

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