Latest Stories By Jon Greenberg

Given that "What is the EU?" was a trending Google search after the United Kingdom voted to leave the European Union, Americans rightly still had many questions about the Brexit vote Sunday.

Hillary Clinton gave a speech on economic policy and spent most of her time going after Donald Trump. She made dozens of claims. We got started on checking a quite a few, and we'll add more soon.

Donald Trump has made a number of claims about refugees. To mark International Refugee Day, we've reviewed a few from his file, along with some about refugees and poverty, and which country is doing the most to help them.

For nearly a decade, the fight against AIDS has aimed to circumcise as many young adult men as possible in Africa. Critics still question whether it does any good. We bring in the epidemiologists.

We sort out fact from fiction at Thursday's Democratic presidential debate.

TRUTH-O-METER! Compare the PolitiFact records of Bernie Sanders and Hillary Clinton.

With private drug companies backing away from infectious disease research, governments and foundations are spending hundreds of millions of dollars to rein in tuberculosis. The World Health Organization says $1.3 billion more each year is needed to get ahead of the world's second most lethal infectious disease.

In her first major policy speech, USAID administrator Gayle Smith listed a number of gains the world has seen in recent decades. We checked her stats, and while Smith did pretty well, she didn't get a perfect score every time.

We fact-checked what the candidates had to say about trade, Common Core and more Thursday at the University of Miami.

Help PolitiFact raise $15,000 to hire an additional fact-checker for 2016

Fact-checking the Democratic debate in Miami

Fact-Check-A-Thon calls out misleading TV ads in 2016 primaries

We fact-checked what the candidates had to say about trade, Common Core and more Thursday at the University of Miami.

Help PolitiFact raise $15,000 to hire an additional fact-checker for 2016

Fact-checking the Democratic debate in Miami

Fact-Check-A-Thon calls out misleading TV ads in 2016 primaries

Democratic presidential candidates Hillary Clinton and Bernie Sanders debated in Miami. 

Help PolitiFact raise $15,000 to hire an additional fact-checker for 2016

Fact-Check-A-Thon calls out misleading TV ads in 2016 primaries

Democratic presidential candidates Hillary Clinton and Bernie Sanders debated in Miami. 

Help PolitiFact raise $15,000 to hire an additional fact-checker for 2016

Fact-Check-A-Thon calls out misleading TV ads in 2016 primaries

Trump says Trump University really has an A rating, not a D-minus, from the Better Business Bureau. Now we know how the bad grade disappeared (and it wasn't by doing a better job).