The first reason is a big increase in voter enthusiasm for Harris, according to Gallup. Their new data gives the Dems a 10-point advantage over the Republicans. Since Harris replaced Biden some 69 percent of all voters now show more enthusiasm than Gallup has ever reported. The caveats here are 1) it’s still a poll, and you know how I feel about that; and 2) voter enthusiasm is not always a good predictor of election outcomes.