Law enforcement frequently keeps tabs on social media to assess potential threats. The task is enormous, and it's an inexact science.
Demagogues rarely commit violence directly. Instead they use blame, fear and ridicule to inspire others to act on their behalf.
Don't let the media convince you otherwise. Right-wing hysteria over an immigrant caravan led to the Pittsburgh synagogue massacre.
He's not welcome in their city until he denounces white supremacy.
Barry Werber, 76, recalls how he and others concealed themselves in a supply closet to escape alleged gunman Robert Bowers' deadly wrath.
A tweet by the AP is the latest example in a wave of conspiracy-tinged victim blaming amid tragedy—led by President Trump and conservative pundits.
Robert Gregory Bowers, accused of killing 11 in Pittsburgh on Saturday, told officers after his arrest that Jews were committing genocide, according to charging documents.
The gunman, who is in custody, is believed to have posted anti-Semitic slurs and rhetoric on social media.
The president talks at a factory in campaigning for Rick Saccone in a House contest that is shaping up as the newest indicator of what might happen in this year's midterm elections.