There have been more than 18 assassination attempts in the last 2+ years.
Trump has always had his own tight personal security around him and the USSS answer to them by his orders.
The USSS is needed because they are like a secret army unto themselves, their infrastructure and worldwide organization is needed but Trump’s personal security controls them.
The reference to firing the USSS Director is not the 1st time.
That Director did not step down but was fired after a prowler was caught at night on the WH grounds peeking through windows, was arrested, and rumored to be looking if the President’s young son could be kidnapped.
Security of President and family is paramount. Any breach results in immediate dismissal.
Maybe it’s time for Trump to start using Room 101.