I believe her comments about the assassination were innocent.
Irresponsible and inappropriate yes but, as I've watched the video a few times, it seems as soon as the words left her mouth, she sort of paused realizing the implications regardless of her intent. I am sorry to say that she was honestly trying to convey a message of persistence.
I believe that if it were not an African American she was running against, the comment would have still been covered but not to this extent.
Ron Paul FTW.

"That's not what I PHucking meant"