John Micah Heinemann is a 2025–2026 Millennium fellow and a senior counsel in the United States Senate. Since 2019, he has led high-profile congressional investigations in both chambers, including reports on the 2021 GameStop trading frenzy and the attempted assassination of US President Donald Trump in 2024. He earned his law degree from the University of Texas at Austin. Originally from the Mountain West, Heinemann enjoys writing, gardening, and spending time in nature.