An ugly wave of rhetoric is showing up on the social media platform Twitter since GOP front runner Donald Trump scored a series of successes on Super Tuesday.

Beginning Wednesday, dozens of Tweets appeared, explicitly calling for Donald Trump’s assassination. Most of the tweets appear to be from accounts of black Americans.

Such calls for violence are a direct violation of Twitter’s terms of service, however at press time all of these accounts are still active. This is troubling given Twitter’s recent history of what appears to be a war on conservative media, including their unexplained de-verification of Breitbart tech editor Milo Yiannopoulos’s account.

The media has once again made its business to play up racial tensions, reducing Trump’s stances against illegal immigration and Muslim terrorism to “racism.”

See what they’ve sown:

Follow Breitbart News investigative reporter and Citizen Journalism School founder Lee Stranahan on Twitter at @Stranahan.