CBS, the same people who brought to you the worst polls this season.
Everything I see WRITTEN about the Kardashians in comments around the Web is highly negative. Yet go to a tabloid, like UK Daily Mail for example, and they'll have several articles/pages devoted to each member of the family on any given day.
So I don't put a lot of stock in the "high negatives." If someone is really famous or in the case of Trump, successful, people generally are not going to be neutral, people will either love or hate.
Ever notice that?