Jon Greenberg is a staff writer with PolitiFact. He was part of the PolitiFact team during the 2012 presidential election and was one of the fact-checkers who launched PunditFact in 2013. Prior to that, he was executive editor at New Hampshire Public Radio and a Washington reporter for National Public Radio. He has twice won awards from the Society of Professional Journalists for investigative reporting.

The latest Truth-O-Meter items from Jon Greenberg

No Flip

Charges of a flip go up in smoke

Recent stories from Jon Greenberg

What happened at the immigration meeting between Trump, bipartisan lawmakers

President Donald Trump offered a surprising look into his talks with bipartisan lawmakers on immigration policy, allowing television cameras to capture about 54 minutes of discussion at a Jan. 9 White House meeting about the fate of immigrants known as "Dreamers."

The top 10 most viewed fact-checks of 2017

During President Donald Trump’s first year in office, nothing drew eyeballs to our site quite like the president’s words.

Donald Trump says he doesn’t know his accusers. Does he?

When four women came forward to talk about President Donald Trump's inappropriate sexual behavior going back to the 1980s, Trump said he hadn't even met or known them. We reviewed the record, not just for them, but for other women, too.

2017 Lie of the Year: Russian election interference is a 'made-up story'

President Trump continually asserts that Russia’s meddling in the 2016 election is fake news, a hoax or a made-up story, even though there is widespread, bipartisan evidence to the contrary.

Fake news in the Alabama Senate race surges before Election Day

With Republican Roy Moore's reported history with underage girls looming large, Alabama voters have been getting more than their share of bad information.

The facts behind Elizabeth Warren, her claimed Native American ties and Trump's 'Pocahontas' insult

Sen. Elizabeth Warren, D-Mass., has taken a lot of grief for claiming Native American roots without hard proof. President Donald Trump has mockingly called her "Pocahontas." We take a close look at exactly what she said and who she told.

The facts on mass shootings in the United States

The murder of 26 people at a rural Texas church has raised questions about gun violence, access to weapons, the role of mental illness and the prevalence of mass shootings in America. Here's some research to help you sift through the debate.

John Kelly, the Civil War and the compromise that almost was

White House chief of staff John Kelly drew a firestorm of criticism when he said an inability to compromise led to the Civil War. We found an eleventh-hour attempt that would have preserved slavery forever. And Lincoln was OK with it.

Fact-checking Trump and his team on taxes

Our partners at E.W. Scripps spoke to the president and quite a few of his top people about taxes. We vetted their claims for accuracy.

Sinclair is targeting PolitiFact. But you need to know the facts

The Sinclair Broadcasting Group, the nation's largest owner of television stations, is attacking PolitiFact for a recent fact-check we published about federal funding related to superstorm Sandy.