An old piece of anti-spy legislation is back in the headlines after the FBI searched former President Donald Trump’s Mar-A-Lago residence for classified materials they believe he took from the White House. 

The FBI has cited violations of the Espionage Act as a catalyst for its document seizure, and reported uncovering materials marked “top secret/SCI.” Among them was a grant of clemency for famed Trump associate Roger Stone.

After unsealed documents revealed the FBI’s findings and warrant for the search, Trump claimed he declassified all the documents prior to leaving office. 

FBI released documents that reveal the Justice Department is investigating Trump for violations of the Espionage Act, obstruction of justice and criminal handling of government records.

But what is the Espionage Act, and why was it created?

WHAT WE KNOW:What did the FBI look for – and find – when searching Trump’s Mar-a-Lago home?

UNSEALING THE DOCUMENTS:Palm Beach Post asking court to unseal ‘entire’ search warrant for Donald Trump’s Mar-a-Lago

What is the Espionage Act? 

The Espionage Act of 1917, enacted just after the beginning of World War I, makes it illegal to obtain information, capture photographs or copy descriptions of any information relating to national defense, with the intent for that information to be used against the United States or for the gain of any foreign nation.

Is the Espionage Act still in effect?

Many significant chunks of the Espionage Act of 1917 remain in effect and can be used in the court of law. In its modern iteration, the act has been used to prosecute spies and leakers of classified information. 

WHO IS ROGER STONE?What to know about the longtime Trump ally and Republican strategist

Why was the Espionage Act created?

The Espionage Act was passed to bolster the war effort. Enforced by President Woodrow Wilson’s attorney general, the law made it illegal to share any information that could interfere with the war or stand to benefit foreign adversaries. It was meant as a safeguard against spying.