Here's an excerpt from the bio of the guy who runs the site:
"Despite 35 years living in Seattle, I instinctively revolted against the suffocating left-coast culture of the Soviet of Washington, and came to revere the four great Germans who helped inspire the Reagan revolution: Ludwig von Mises, F.A. Hayek, Leo Strauss, and Eric Voegelin."
However, he does link to real government sources (near the botton), so you can check to see if he weighs by ideology when posting numbers.