This is what I was talking about with the "undecided voter" discussion earlier.
Yes there are people out there that Harris/Trump could get to their side by doing or saying something, that's pretty much what "undecided voter" means. Or to probably be more accurate "unmotivated voter" getting people who don't intend to vote out to vote, probably a much bigger group.
But what they are no longer is big, voting demographic blocks of people to reach out to. The problem with "undecided voters" is there is nothing singular you can say or do that is going to reach a meaningful number of them at once.
Economy of scale is a thing in politics. Abortion is a big issue. A lot of people have strong opinions about abortion and that affects them voting. So ruining a "Yay/Nay Abortion!" is money and time well spent because that's a lot of people who care about a single issue.
What do you say to this big mass of "undecided voters" who are all not voting or voting for your opposition for their own reason?
Modern politics really sorta forces you sink most of your resources into courting one issue or "a small handful of issue" voters to get the most return on investment because there is no way to reach out to a massive undefined group of "undecided" who are all undecided for their own reason in a mass web of vague, contradictory, and impossible to "message" all at once reasons?
Unless someone has an educated guess as to some "neither Trump nor Harris are addressing THIS issue and they can address it in my favor without stepping on one of their already established platforms/theme/personality?" Because I can't imagine what that could be.
Sure there's probably Mr. Edward V. Hackensmith in some latchkey district in Pennsylvania who could tilt the entire election, but he's gonna decide between Harris and Trump based on something that's not on Harris's radar, Trump's radar, Nate Silver's radar, or anybody else's.
Hell at times I legit wonder how big of a demographic "I, honestly and truly, couldn't tell you WHY I'm voting for this candidate over that candidate" actually is.
So too long, didn't read. Yes you can reach out and change the mind of "undecided voters." But not in any efficient, mass way.