Politifact fact-checked one of Pres. Trump's tweets Sunday and declared the "the numbers check out." The fact-checking site then rated the tweet "mostly false."
Trump had tweeted that the National Debt in his first month went down $12 billion vs a $200 billion up-tick in Barack Obama's first month, with PolitiFact reporting, "The numbers check out." But in the typical spin-style of Progressive NewsSpeak organizations, they wrote exactly the opposite of the truth based on a political opinion, declaring the tweet "mostly false."
So, in the world of fact checking, PolitiFact being one of the more noted vetting mechanisms, the truth doesn't matter as much as an opinion on the truth.
Interestingly, PolitiFact used to back-up Pres. Obama's claims that the economy was rockin', that unemployment was down - even though the Labor Participation Rate was dismal and the jobs created were mediocre-paying part-time jobs at best, and that al Qaeda had been decimated.
So, with just this brief juxtaposition, we can see that PolitiFact bases it's ratings on the ideological theories and opinions held by their vetters.
PolitiFact: Worthless as teats on a bull.