By the numbers: Three times as many voters said President Trump did worse than they expected in the debate — 39% compared with 13% for Biden.

A majority of Republicans (57%) and independents (61%) said their primary reaction was disappointment.

37% of Democrats said they walked away angry, compared with 24% of independents and just 9% of Republicans.

Between the lines: Biden may have to lean into that anger to propel his backers to the polls. Only 5% of Democrats said they were primarily excited after the debate, compared with 18% of Republicans.