UPenn Professor Under Fire for Controversial Posts on Charlie Kirk Assassination

Backlash over professor's social media activity following Turning Point USA founder's murder

Apr. 10, 2026 at 6:19am

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A dimly lit office desk with a laptop, papers, and a framed photo, all bathed in warm, diagonal sunlight and deep shadows, conveying a sense of quiet contemplation and the gravity of responsibility.The controversy surrounding a professor's social media posts highlights the need for more civil and constructive political discourse, even in academic settings.Philadelphia Today

A University of Pennsylvania senior administrator, Professor Michael E. Mann, is facing criticism for his controversial social media posts and retweets following the assassination of Turning Point USA founder Charlie Kirk. Mann, the director of the Center for Science, Sustainability & the Media, has been accused of downplaying the tragedy and making inflammatory remarks about Kirk's legacy.

Why it matters

The incident has sparked a debate around the role of academic institutions in addressing politically-charged rhetoric from their faculty, as well as concerns over the potential for political violence and the need for civil discourse, even in the face of deep ideological divides.

The details

Mann reposted a tweet mocking Ezra Klein's New York Times column on Kirk, which referred to him as the 'head of Trump's Hitler Youth.' He also posted that Utah Governor Spencer Cox was offering 'thoughts and prayers' in response to the assassination, and included a link to a gun control advocacy group. These posts drew the ire of conservative commentators and Pennsylvania Senator Dave McCormick, who called the behavior 'despicable' and demanded immediate action from the university.

  • The controversial posts were made in the aftermath of Charlie Kirk's assassination in April 2026.

The players

Michael E. Mann

A senior administrator at the University of Pennsylvania and the director of the Center for Science, Sustainability & the Media, who has come under fire for his social media activity following the assassination of Charlie Kirk.

Charlie Kirk

The founder of Turning Point USA, who was assassinated in April 2026.

Dave McCormick

A Republican senator from Pennsylvania who condemned Mann's behavior and called for immediate action from the University of Pennsylvania.

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What they’re saying

“This is despicable behavior. This dangerous rhetoric cannot and will not be tolerated. I will unequivocally condemn this behavior and demand UPenn take immediate, decisive action.”

— Dave McCormick, Senator, Pennsylvania

“When people in positions of power, like [Mann], continually demonize their political opponents, calling them 'nazis' and 'threats to democracy,' they cannot act shocked when people act on their inflammatory rhetoric. This is wholly unacceptable, [University of Pennsylvania]. Fire him.”

— Will Hild, Executive Director, Consumers' Research

What’s next

The University of Pennsylvania has stated that it is reviewing the matter and will take appropriate action, though no specific timeline has been provided.

The takeaway

This incident highlights the ongoing tensions around political discourse and the responsibility of academic institutions to foster an environment of civil debate, even in the face of deep ideological divides. It also raises questions about the role of social media in shaping public discourse and the potential consequences of inflammatory rhetoric.