In developing current and future leaders, I’m fascinated by the role regret plays in leadership maturity — and how it shapes who we become. Frank Sinatra once sang, “Regrets, I’ve had a few… but then again, too few to mention.” In reading today’s ABC interview with Kamala Harris, she admits she regrets not challenging Joe Biden’s decision to seek re-election in 2024 — a decision she now calls “reckless.”