Donald Trump: My Security Team Is YUGE! (VIDEO)

Donald Trump's days of roaming freely about town are over ... because the Secret Service has now stepped in and his security team is no joke.

Trump was leaving the Fox News building Monday morning in New York City and his security team left nothing to chance ... barricading off fans just so he could make the short walk to his car.

Speaking of the car ... Trump usually travels around town in a limo, but that's been replaced with a blacked-out SUV.