According to Juan Williams at NPR, the black community fears for Barack Obama's safety. Simply because he is a black man "rising to a certain level of power."
Hillary Clinton is running a racist campaign. She has evidently advocated for assassination (though I believe her comments were not meant in that way).
The media and others are making sexist attacks against Hillary, which she certainly is using to her advantage.
Evidently the voters of America are racists and sexists. What an uplifting campaign.