The media are definitely reaching voters. They knew of all the polling. States with a Democratic majority in most elections had low turnout as they knew Harris would win.
There were groups that seemed to react merely by gut feeling. Young black or Latino males in Michigan voted for the alpha male. Similar voters were able to vote for Biden 2020. It's easier to be the alpha male....if you are a male.
The excitement to defeat Trump was definitely there in 2020. Looking at PA.
Then in 2024 it was Trump that got almost the same number as Biden got in 2020. It cannot be the same 3.4 million that voted for Biden and now Trump, it just looks comical. The shift was some 100 000 voters. So even though Michigan was maybe doable for Harris (if she had had a whole year to campaign) this PA group of shifting voters was again decisive.
It may be noted that Harris was not just a woman but a vice president. Typically they do not do well, having sometimes spent almost eight years almost invisible to the general public.
Prediction for 2028: they will run a male governor.