FactCheck.org is an excellent project of the Annenberg Public Policy Center of the University of Pennsylvania. It a non-partisan organization which provides factual evaluations of the claims of and about political figures. I have cited it in my own writing, and will continue to do so. However, that FactCheck has a well-deserved reputation for accuracy and good judgment does not mean that its work is infallible, as the VC has pointed out previously. The Encyclopedia Britannica also has a well-deserved reputation for accuracy and impartiality, but the Britannica sometimes contains errors or overstatements.
FactCheck