This is not a populist movement. It is a white nationalist, bigot, racist, misogynist movement. Object when you hear the news media using 'populist' framing.
Populism has been pretty much the same story all over the world, throughout all of history: punish the scapegoats, burn some witches and divvy up handouts for the in-group. Can be rather powerful to demonize some outsider we can blame for all the problems in our lives.
Maybe yours didn't turn out the way you wanted because of a Zionist conspiracy, China, NAFTA, Mexicans, Muslims, or maybe it was due to Mark Zuckerberg and Jeff Bezos, Walmart, vaccines, fluoride chemtrails, the 1% illuminati gay frogs or "globalists" etc, surely nothing to do with the decisions you've made.
This kind of rhetoric delivers votes and energizes the base, but the policy that results tends to be symbolic measures to punish the scapegoat and provide some catharsis rather than effective solutions for complex problems. To some extent every successful politician invokes similar tactics, but the more they lean on this crutch the more it handicaps their leadership.
How can you inspire an entire nation to transition to rapidly changing tech and services economy when you put all the blame and all the power for success or failure onto the scapegoat? You can build a border wall and punish China but the same unemployed and underemployed people who voted for you didn't magically get training or transition to better career.