Business Coinbase Appoints Former Obama and Harris Adviser David Plouffe to Strengthen Political Strategy by Olawunmi Sola-Otegbade June 12, 2025 by Olawunmi Sola-Otegbade June 12, 2025 Coinbase, the largest cryptocurrency exchange in the United States, has appointed David Plouffe — a former senior adviser to President Barack Obama and Vice President Kamala Harris — as a …