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PolitiFact's running blog of fact-checks at the first presidential debate.

We're annotating the first presidential debate on Medium.

What we've learned about Hillary Clinton and Donald Trump after nearly 400 fact-checks.

The staff of PolitiFact live fact-checks the first 2016 presidential debate.

If you hear any of these Wisconsin-related statements tonight, you'll know whether they're True, Pants on Fire or somewhere in between.

Every Friday we'll highlight some of the fact-checks from the presidential campaign trail.

Each candidate is under fire for their family foundation. We created a side-by-side chart to understand the issues at play.

Ever hear a politician make a claim and wonder -- 'Is that true?' PolitiFact California wants to hear your suggestions for a fact check.

Once a message becomes engrained in an official's platform, it's probably not going to change, no matter how much we point out its inaccuracy.

Hillary Clinton says Donald Trump is no stranger to pay-to-play politics.

PolitiFact Editor Angie Drobnic Holan reflects on fact-checking debates and how moderators' performance matters. 

Donald Trump may have conceded that President Barack Obama was born in America, but he didn't dial down his claim that Hillary Clinton started the birther rumors in the first place. We took a look at all the evidence, especially new allegations.