Use all‑adult approval as legitimacy metric

Treating the all‑adult approval average (not just likely‑voter models) as the baseline frames presidential popularity as a measure of national legitimacy rather than an electoral forecasting tool. That shifts emphasis from short‑term turnout mechanics to broader public opinion — meaning approval gaps matter for democratic authority even when they don't predict votes. — If newsrooms and analysts adopt an all‑adult baseline, debates about presidential mandate, crisis legitimacy, and governing license will center on public sentiment rather than turnout models alone.