First of all, Google Search is a search engine. Search engines were not designed to evaluate the veracity of content. They simply find other websites with content relevant to your search terms.
This is the Internet and it has always been incumbent upon Internet users to exercise discretion with regard to the quality of content that can be discovered. How is this confusing?
Secondly, removing USA Supreme as the number one search result would only replace one bias with another. CNN can publish slanted material just as easily, and given their viewership is so much larger... you might almost think they have the better incentive to do so.
Limiting search results to approved news sources sounds like totalitarian philosophy to me.