I'm truly impressed.
From medical researcher, to constitutional lawyer, to personal protection security expert.
Your talents were wasted as a building contractor.
I dunno though - as an outsider it seems to me the burden at this point is on the SS (and maybe the local police?) to explain themselves. Whatever the reasons, they failed (or at least performed very poorly and came very close to failing completely) at their core task.
Astonishing luck from Trump's perspective, though. All the drama and chance for a photo-op of a close call assassination attempt, but absolutely minimal physical consequences to himself. Reagan had to spend a lot of time in hospital, IIRC, and I presume endured significant physical suffering.
And maybe it's quite egalitarian that the US security apparatus is nearly as bad at protecting those at the top from gun violence as it is at protecting school children?