Ok, Leif. I'm going to give you the benefit of the doubt and give you the opportunity to validate this statement.
Example 1) Dick Cheney cited FactCheck.org during the 2004 elections, specifically referencing their defense of his actions as CEO of Halliburton.
FactCheck.org
Example 2)
FactCheck.org
Here are two examples of FactCheck.org dropping the bullshit hammer on two different high-profile Democrats. Now I want you to explain to me how the definitive liberal slant of FactCheck.org can be seen in 30 seconds of browsing their site, because I just spent about that same amount of time to find these two examples to the contrary.