The candidate largely let the billionaire run his $175 million ground game — a gamble that future candidates could look to emulate.

© Hiroko Masuike/The New York Times

Here’s what we learned after analyzing 3.7 million election ads.

Republicans are banking on an issue that isn’t a priority for voters: trans rights.

Readers discuss Democrats’ concerns that her bid will throw the election to Donald Trump. Also: Harris ads; drug-free treatments; regretting email.