Interesting post—but SS has a lot of other duties other than protecting dignitaries.
This long article walks through all those duties:
https://en.wikipedia.org/wiki/United_States_Secret_Service
It is a classic case of “mission creep”:
“The Secret Service is tasked with safeguarding the payment and financial systems of the United States from a wide range of financial and cyber-based crimes.
Financial investigations include counterfeit U.S. currency, bank and financial institution fraud, mail fraud, wire fraud, illicit financing operations, and major conspiracies.
Cyber investigations include cybercrime, network intrusions, identity theft, access device fraud, credit card fraud, and intellectual property crimes.
The Secret Service is also a member of the FBI’s Joint Terrorism Task Force (JTTF) which investigates and combats terrorism on a national and international scale.
Also, the Secret Service investigates missing and exploited children and is a partner of the National Center for Missing & Exploited Children (NCMEC).”
Thanks for the info; did the scope of SS responsibility change at all when it moved from Treasury to HS after 9/11?