Yeah man, I wish it were that easy. You see, just reporting the facts sounds like a convenient little slogan but scratch the surface it gets a lot more complicated. If a person only reports some cherry picked facts, they can paint a very different picture than if someone reports all relevant facts. It can be very purposefully misleading, but still factual. However, no one could possibly report every fact there is, so no matter what you do, a reporter is going to have to chose some facts to leave out. It is a subjective call to determine what's important and what isn't, so no matter what you do, there's going to wind up being some people who determine your reporting is biased because you reported some fact they didn't like or left out some fact they found to be more relevant than you. That doesn't even get into determining what is and isn't a fact, which these days it seems like no one can decide on.
Then report both sides. Have one make an argument for the Left and another for the Right. It should not be overly difficult.
It's endlessly difficult. If all you're doing is letting people make two different arguments, then you're no longer reporting facts but propagating political positions. I'm not saying that's not useful in itself, but it's also not exactly the same thing as journalism. Hearing a skewed argument from the left and a skewed argument from the right doesn't actually do much in my opinion. You don't magically land in an unbiased position after that. What that really does it just facilitate the identity politics. People will pick the person that they identify with (i.e. someone on the left) and ignore what the other person has to say. It facilitates individual bias more than anything. I mean, think about the current economy. The right will tell you it's booming. The left will tell you it's a disaster. The answer is in the middle, somethings are doing great, some aren't, but you don't come to that conclusion by listening to these two opposites describe the same thing.
Journalism is about figuring out what is true, reporting what happened, understanding the world. You don't get that by listening to two opposite but skewed viewpoints.