A while back, during the election campaign here in the UK, I saw someone talking about how disproportionate reporting by centre/left news outlets on how well the right leaning parties were doing was really good for reminding their audience that a Labour win was not a given and that their vote mattered.
In the case of the US, I think there’s a good amount of that, as well as large a scoop of cope from the right leaning news orgs. Cherry picking their sources means that outlets can present the polling as close, which flies better in the headlines.
Or all that is bollocks, and the US really is a gibberish shitshow.