David Brooks:

Yes. And those numbers are low. People don't want to admit they're actually voting on the president, when, in fact, they are.

And so I would say it's 80 percent is really who Trump is. And he represents a fundamental shift in what the country, how the country sees itself, how we see our foreign policy, how we see our identity. He's a very talented cultural poker.

And so a lot of identity issues, a lot of cultural issues are poked by the way he talks about the caravan, the way he talks about men, the way he talks about women, the way talks about race. And so he's presented really a fundamental challenge, first taking over the Republican Party, and a challenge to the way either party has defined the country and defined themselves in defined morality, basically.

And so he is sort of this revolutionary force, and so it's not surprising the election would really revolve around him. I think it's a mistake, personally, that the Democrats are countering him by running on health care, on preexisting conditions and some of the Obamacare benefits.

I think the Democrats constantly make a mistake where they say, we can win elections by offering people material benefits, and then they don't understand why they lose the working class, because they say, what's the matter with Kansas? We offered these people these benefits and they didn't vote for us.

It's because most people vote on culture and identity, not on material benefits. So when the Democrats go to materialism, and Donald Trump is doing culture, I think it's playing more into his hands, because there's no response.