U.S. Constitution

If the president ever promoted his D.C. hotel to foreign dignitaries, the attorneys general of Maryland and the District of Columbia want to know about it.

A federal judge has rejected a motion from the Department of Justice to dismiss the suit. The lawsuit alleges Trump's businesses, especially his hotel in D.C., violate the Constitution.

A federal judge ruled that Maryland and the District of Columbia can sue Trump. The states allege that he wrongly profits when foreign officials do business at the Trump hotel near the White House.

The 27th Amendment had languished for nearly 200 years before a Texas student made passing it a personal cause. The amendment was ratified 25 years ago this weekend.

The Supreme Court heard arguments in a "very sympathetic case" involving the shooting of an unarmed Mexican teen on the border. The justices will decide if the boy's family may sue the border agent.

Some rivals say the plan to bar Muslims is "offensive" and "unhinged." Some pundits have called it "unconstitutional." But experts say the Constitution gives Congress leverage on whom to let in.

President Obama has launched a sustained, long-term military campaign against the Islamic State, also known as ISIS or ISIL. Four legal experts debate whether he had the constitutional power to do so.

Law enforcement agencies across the country subpoena cellphone location data regularly. But civil liberties groups hope a series of state-level legal victories will usher in stronger protections for that often-revealing digital information.