It's all about the feelings, and the feelings are all about how the American people experience Kamala Harris at a personal level.
Honeymoons are about Love. And Kamala has the opportunity — because of the extreme contrast with Donald Trump (only one of the candidates is a “good person”), and because she’s so good at dramatizing her own human qualities — to get a goodly share of the American people beyond the Democratic base to give her some place in their hearts. Enough connection at the feeling level for the honeymoon to continue up through election day, and yield results at the ballot box.
This video offers some thoughts about the ways Kamala can get that positive place in people’s hearts, along avenues that are not specifically about politics.