Thomas J. Fitton is an American conservative activist and the president of Judicial Watch. Fitton is known for pro-Trump commentary. Fitton is prominent for criticizing Special Counsel Robert Mueller's investigation into alleged Russian interference in the 2016 United States presidential election; he has said that the investigation was a "coup" against U.S. President Donald Trump and called for it to be shut down. In 2022, researchers found Fitton was the third-most prolific purveyor of election misinformation on Twitter during the late months of 2020.