Trump's firing of Comey triggered an FBI counterintelligence investigation. Here's what ‘counterintelligence’ entails.
How the Times Reported the F.B.I. Counterintelligence Investigation Into President Trump …
Why the FBI might've thought Trump could be working for Russia
Julián Castro announces he is running for president in 2020
Former HUD secretary Julián Castro joins 2020 Democratic presidential field