There has been a steady stream of credible analysis of polling, registration, and likely voting over the last week or so that has indicated that the “herding” effect, along with oversampling of Trump supporters (and inadequate statistical compensation for it) in many national polls, ironically partly due to pollsters being deathly afraid of being substantially wrong in this cycle, is likely overstating Trump support generally, and particularly in several swing states.
I am not getting excited, but I am far more optimistic then I was only a month ago.
I would say that the betting markets might actually be very poor indicators this cycle, as well, for a number of reasons. Chief among them are evidence that a few prominent non-regulated markets (like Polymarket) have been fraudulently manipulated to show Trump as heavily favoured, and the fact that the regulated markets themselves are largely dominated by Trump supporters (due to the heavy crossover between the day/meme trader community in the US and MAGA support, in which this sort of extreme betting culture is ingrained).