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

Recent stories from Jon Greenberg

Increase in murders by immigrants in Tulsa?

In a radio interview, Tulsa's homicide chief said he'd seen an increase in murders by immigrants. We looked at the details. There were two last year and the year before that. Amounting to about 2 percent of all murders.

PolitiFact fact-checks Darkest Hour, Dunkirk, The Post

We look at the accuracy at some of the Oscar nominees for best picture. 

Fact-check: Darkest Hour movie gets Winston Churchill mostly right

The Winston Churchill biopic stays within the guardrails of historical fact, but it does take liberties. 

Dunkirk fact-check: Movie indulges a few myths but also uses the facts

Never content to simply enjoy a good movie, we wanted to find out how closely "Dunkirk" matches what really happened on a beach in France in May 1940.

What we know about mass shootings

With each tragedy, we hear arguments about gun violence, mental health, how firearms should be regulated and what’s driving the prevalence of mass shootings. PolitiFact has worked for years to research these topics to explain talking points used by all sides of the debate.

Timeline: Rob Porter, domestic abuse and the White House

The White House statements about the vetting of top aide Rob Porter have shifted over the past week. We break down what happened and when.

Fact-checking Donald Trump's 2018 State of the Union speech

PolitiFact is fact-checking President Donald Trump's 2018 State of the Union speech.

PolitiFact previews Donald Trump's State of the Union address

President Donald Trump delivers his first State of the Union address Jan. 30. Get ready with our review of his past claims on key topics, and join us as we fact-check him live, along with the Democratic response. 

Fact-checking Donald Trump's fake news awards

President Donald Trump called out some of the biggest U.S. news organizations in his promised "fake news awards" Jan. 18, 2018. 

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."