You've heard of Neilson ratings... How about a Trust Rating?
How about a third party that certifies the facts and guarantees that the opinion in which they are expressed by is not slanted past a certain degree. Perhaps give a slant rating. Also, These third party could give a balance rating to a company on a certain issue or candidate. Out of X number of news stories, how many (positive and negative stories) did a given outlet run on each side? The third party could have internal peer reviews and other checks and balances (who watches the watchers?)
Can you imagine what these numbers would look like this election season? One last thing. How about each story has the author name at the bottom, but the link to their profile includes their voting record and party affiliation.
Now that would be transparency.
How about a startup for a news aggregation that somehow did this in an open and transparent way. They would disclose the reasons for all their decisions to keep things honest. Finally a one stop shop to get a balance of stories and opinions, both sides of the story, the actual truth about what is going on. There are so many misinformed people today.