Secret Service spokesman Ed Donovan identified the suspect as Joseph Moshe, 56, of Los Angeles. Moshe is suspected of calling a police dispatch number Wednesday and making threatening statements about the White House, Donovan said.
Police pulled him from the car after he ignored repeated attempts to negotiate his surrender.
The Federal Building had been locked down since noon, and employees were told to stay inside, FBI spokeswoman Laura Eimiller said.
Officers spotted Moshe's car around 10 a.m. near his home in the Westchester neighborhood and pursued him through the city's west side, police Det. Gus Villanueva said.
He drove around the federal building parking area once before a police SUV blocked his path as he tried to return to the street. Officers then surrounded his car with police cruisers and a large armored vehicle.
The man sat in the car smoking for hours before a robot broke a rear window of the car so officers could see inside, police Lt. Ruben de la Torre said.
Police did not know if the man was armed, he said.
Villanueva said Moshe was booked on two previous unrelated misdemeanor warrants but did not provide details. Officials later said he was taken to a hospital for observation.
Asked how the man was able to withstand multiple rounds of what appeared to be tear gas, Villanueva said some people are able to resist the chemicals.
"I can't explain that, there's no way to explain that," he said.
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