Side-by-side bar charts showing turnover of "A-team" (senior executive office) positions in the past seven U.S. presidencies. On average, presidents lose 13% of "A-Team" staff in their first year, and 27% in their second year. Joe Biden lost 8% and 32% in his first two years, respectively. Donald Trump had the highest cumulative turnover in the data, at 66%, while Ronald Reagan had the highest single-year turnover, losing 40% of senior staff in his second year.