Correct me if I'm wrong, but most of the whack-jobs that try or have whacked a President are a few short of a six pack, rather than being motived buy racial hatred.

God, or the voices in their head usually tell them that the President is evil and must die at their hands.

Most true racists are so damn in-bred to begin with that they are not smart enough to kill a President.

Just your normal, average fleet of Presidential Security Detail Secret Service Officers will easily contain those fine excuses for human beings.

Don't think Obama should be any more worried or concerned than any past President (minus JFK and Reagan, or course.)