Ruth Ben-Ghiat is a history and Italian studies professor at New York University. She studies fascism and her upcoming book is “Strongmen: From Mussolini to the Present.”

Kathleen Belew, a history professor at the University of Chicago, is the author of “Bring the War Home: The White Power Movement and Paramilitary America.”

Nancy L. Rosenblum is a professor of ethics in politics and government at Harvard University. She co-authored the book A Lot of People Are Saying: The New Conspiracism and the Assault on Democracy.

Brendan Nyhan is a government professor at Dartmouth College. His areas of study include fake news, fact checks and digital media literacy.

Alex Newhouse is a researcher at Middlebury College’s Center on Terrorism, Extremism and Counterterrorism, where he looks at right-wing and online extremism as well as religious fundamentalism.

Phil Howard is director of the Oxford Internet Institute and author of the book Lie Machines: How to Save Democracy from Troll Armies, Deceitful Robots, Junk News Operations, and Political Operatives.

Eduardo Gamarra is a politics and international relations professor at Florida International University. He is also the director of the school’s Latino Public Opinion Forum.

Mark Fenster is a law professor at the University of Florida. He wrote Conspiracy Theories: Secrecy and Power in American Culture and The Transparency Fix: Secrets, Leaks, and Uncontrollable Government Information.