I think bias gets too much press. Fairness is what I try to look for, and that's very different from lack of bias. But you didn't ask for us to get up on a soapbox so. . .
Anything by Bob Woodward will be pretty solid and readable. Plan of Attack was recommended reading by both the Bush and Kerry campaigns, so evidently they both felt it was an honest presentation of the build up to the Iraq War. Shadow: some-other-stuff-I've-forgotten-after-the-colon was very good as well. It's about the legacy of Watergate on the Presidency up to Bill Clinton (the book was published during his admin).
Bushworld: Enter at Your Own Risk by Maureen Dowd was clever and amusing. Straightforward policy disagreement isn't quite her thing, she's a lit lover and a wordsmith, the book deals primarily with the exploitation of imprecise language that this administration seems to rely on, and some themes of the Bush family relations she sees as fitting into Shakespearean type dramas.
The Future of Freedom by Fareed Zakariah is a must read if you feel, like much of the Western World, that self determination is where it's at for a national government. He cuts through the bullshit rhetoric of democracy and "giving them a chance to vote!", and illustrates the actual processes that have to occur for democracy to succeed very eloquently, and what ingredients contribute to the failure of such a system.
Don't forget to add 1984 to your fiction list after Animal Farm.
I have to confess to a fondness for most of Jimmy Carter's books, but that's a sentimental thing as I consider him to be a very personal hero. Of course, few folks agree with me on that so, who knows, but you might enjoy some of his weightier stuff too.
I could add dozens of titles, but I'll rest there.