Maria Butina may be only the latest in a long line of Russian agents to go undercover on U.S. campuses

DeVos' brother, Blackwater founder Erik Prince, reportedly recruited an former spy to infiltrate a teacher's union

New details surrounding the Russian sleeper cell deported from the US in 2010 reveal their aim: children

Anna Chapman may have engaged in espionage from a lower Manhattan coffee shop

Russia's military has engaged in several provocative acts recently

How the brother of Betsy DeVos reportedly helped infiltrate "groups considered hostile to the Trump agenda"

"These actions are unfounded and pursue unseemly goals," the Russian Foreign Ministry said in a statement

"You’re making statements that actually haven’t been proven," the former Obama adviser tells the Fox personality

Former counterespionage agent Naveed Jamali says Trump's not a "Manchurian candidate" — but could be a stooge

In an atmosphere of growing suspicion, an exchange would help repair ties between Moscow and Washington

Naveed Jamali was a double agent battling Russian intelligence. He says their plans have worked brilliantly

The through line in the conversations with Russians, from Trump Tower to the Seychelles, is lifting sanctions

A comprehensive roll call, from Byrd, Salinger, Redgrave, McQueen, Horn, Curtis to many more

The New York Times uncovers more unsavory details about the Cold War

Russian ring members face future in country that views them as failures; 4 released to West must leave homeland