Liberals are known for their dishonesty. How many times has NBC been caught editing tapes?Factcheck is owned and run by liberals, who support liberal causes. They're a mouthpiece for the Democratic Party. Snopes is similar.
The only thing they seem to have in common is that they say things you don't like. They're 100 times more trustworthy than The Blaze, WND, Breitbart and the other go to propaganda arms of the right.
You made the charge, you provide the evidence. I'd wager it's far fewer times than any of the sources of right wing "truth" I mentioned.