Would you rather it be from Fox, Breitbart and World Nut Daily?
By the way my favorite news sources are Vox, Vice, and the Intercept.
Finally, I wouldn't consider Politico to be a "lefty" site. I have some conservative friends that share articles from there on Facebook. If you really want "lefty" sites, go look at Jezebel, Daily Kos, Addicting Info, and TYT. However, places like Politico, CNN, and the mainstream media don't really have a "leftist" bias.
Now don't get me wrong, there are biases in the media. However, they aren't to any political side. The three main biases that there are in the media are a sensationalism bias, a bias in favor of the establishment, and a neutrality bias (call everything 50/50.)