The main sample is from David Matthews's song "Silent Running."
RJD2 used the same sample in his two-song track "Work." "Here's What's Left" begins at 11:39.
It's a KKKampain, it's a KKKampain, I didn't st-stu-stutter motherfucker. It's a KKKampain, a KKKampain, to liberate the Iraqi people, give them the same rights, freedom, democracy, as the western world, right.... what a beautiful world it is...