By your definition then any "popular" politician is a populist. Trumps values are diametrically opposed to the common people. Take for example his position on medicare. The people who voted for him bought into his "brand" and continue to do so. It's a "tribe". Even people in his own party (right wingers...gasp) are uncomfortable with his tactics. For example Comey was a card carrying Republican until recently. Trump has harnessed  the dark side of populist politics and the US is going down a very dark road...
It occurs to me that thinking people everywhere have a stake in this. Conservatives need to stand up and speak out every bit as loudly as their more  liberal partners in this project we call democracy.