Obama should have gone, but it wasn't on a golf course, so I understand. In his stead, it should have been Biden or at least Kerry.
I always thought it was the line of succession, even down to the Speaker of the House if necessary. At least an august Senator, if nobody else is available.
None of which are American Patriots to be trusted (with the exception of a handful of Senators), and I sincerely don’t believe any of them were invited, anyway.
They didn’t invite the unknown French ambassador chick to rally, either.
Holder was in Paris at the time and he is the Attorney General of the US and is responsible for prosecuting terrorists among other things, The FBI works for him.