At first I was puzzled to see the Secret Service was involved. I have just learned that the Secret Service's other (and original) mission is to protect the security of the US financial system. When they were founded in 1865 (ironically, the day Lincoln was assassinated) their job was stopping counterfeiters. Protection of high profile officials came later, beginning in 1901. [0]

[0] https://en.m.wikipedia.org/wiki/United_States_Secret_Service