According to police, officers responded to the business on Lake Pine Drive on Wednesday afternoon.
Apex police said a "violent individual" made public threats toward President Trump, leading to the evacuation of the building. The messages were found written on the back windshield of the car.
The bomb squad's robot was launched to check out the car.
Police tell ABC11, as part of that response, the individual's vehicle was searched for explosive devices as a precaution.
The person involved has been arrested. Police said charges are pending.
Secret Service is also on scene, Apex police says.
Download the ABC11 app for breaking news and weather alerts
People are being asked to avoid the area until further notice.
SEE ALSO | Grand jury in NC indicts former FBI Director James Comey over controversial Instagram post