I agree.
Today some people evoke the risk of assassination to say this: he risks something, because HE is "worth" assassinating. Whereas Clinton, well, does not risk anything...
That is the message I think. HE is a real agent of change, HE is the new JFK, HE will have strong opinions against the bad people...Therefore HE risks to be murdered.
And so, unconsciously, you say to yourself, well that's right, he is a bit like JFK, yes he wants things to change, and by voting for him I could make things change, because he takes risk, even the risk of beeing murdered.
Whereas Clinton, well... not the same level.
That is for me the thing: all this gives the impression that Obama is at a much higher level than Clinton.