The economics of it are interesting. Clinton lost in the rust belt, apparently because many blue-collar workers saw free trade as having led to factory closures. So Trump is arguing for the destruction of free trade deals, and then what? Presumably, tariffs against Chinese goods? That often leads to retaliation, of course. We shall see if Trump can bring jobs back to the rust belt, although I think this had been happening to an extent under Obama.
But Trump is also promising massive spending on infrastructure, building roads, bridges, and so on. Ironically, this is often a policy of the left, or Keynesians.
I hadn't really noticed in the debates that Trump landed powerful blows against Clinton on free trade, and she stumbled and stuttered.
So it goes.