The Posse Comitatus Act limits the federal government’s ability to use the military to enforce domestic policy within the United States. However, this act has so many allowable exceptions, it has rarely been officially violated. When Trump suggests “The Feds” should police Chicago to get the murder rate down, he might have found the perfect example of a Posse Comitatus Act violation.

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When the office of Trump’s personal lawyer, Michael Cohen, was raided by the FBI, Trump took twitter to express his concern. He wrote “Attorney-client privilege is dead!” Let’s see if it is.

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The Fourth Amendment includes the right to be secure from “unreasonable searches and seizure.” We have some idea of how this applies to cops, but if teachers are allowed to carry guns in school, are they also subject to the Fourth Amendment?

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The Russia investigation has been called a "witch hunt" by Trump and his supporters on Twitter. And they've invoked the legal concept "the fruit of the poisonous tree" to invalidate the investigation. What does the Fourth Amendment say about tainted investigations and does it apply to Trump?

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The Tenth Amendment limits the federal government’s control over the states, but the interpretation of that limit is always shifting.

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The Fourth Amendment says that “The right of the people to be secure in their person, houses, papers, and effects, against unreasonable searches, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.” But at the border, warrantless searches are OK, even when it comes to our digital devices. With Trump's focus on the border, this is becoming a bigger deal.

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Trump likes to threaten the press with libel lawsuits. What does the Constitution have to say about defamation and the press?

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You might not remember December 22, 2017 as a particularly notable day, but I will always remember it as the day the world first saw Donald Trump’s redesigned Presidential Challenge Coin. Because 99% Invisible did an episode about challenge coins and we actually offered our own coin to donors, my association with challenge coins is strong. Because of that, I was forwarded the December 22 Washington Post article about Trump’s garishly over the top challenge coin by about...9000 people. Here’s a story about challenge coins and my reaction to the Trump coin.

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Two Vice Presidents have been indicted with criminal charges while serving in office, but does the Constitution allow the prosecution of a President? Elizabeth Joh and Roman Mars explore this question.

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Presidents don't usually weigh in on criminal cases. In fact, it’s critical to the integrity of the criminal justice system that the executive not try to influence the outcome of cases. But Trump can't help himself. President Trump has called the US criminal justice system “a joke.”

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