Ok I have a theory.
If USSS protects h and o, what happens during a government shutdown?
Do these guys take a BREAK?
Also another theory for the line:
T: B, F, J, 1, 5, 11-20
What if F is Florida, J is Jackson(MS). Trump's travel schedule immediately preceeding the BREAK?
R for Randolph. Short for USSS. He could order a standsown during a shutdown probably.