This was not a failure of the TFR, or RID. It was a failure of the Secret Service.
Only incompetent boobs at this point would NOT have RID and Aeroscope monitoring equipment, manned and actively monitored hours before and during the event.
A man lost his life. A presidential candidate was almost assassinated. This is not bean bag, folks.
Why are the US Secret Keystone Kops Service dicking around like this is some primary school playground game of Mission Impossible? I get to play Mr. Phelps!
This is the sort of thing I support RID for.