Is Donald Trump a Radical Centrist?

[Fuzzy Bear]

A Radical Centrist combines aspects of the dissident left and dissident right. They primarily anti-establishment rather than ideologues. They may support conservative positions such as immigration restrictions but may align with the left on non-interventionism, protecting entitlements, and regulating Wall Street. They tend to be moderate or ambivilent on social issues such as abortion and gay marriage.

This.

Trump does get mileage out of issue positions where the right and left converge.  This is why more Bernie Sanders supporters will support Trump than conventional wisdom suggests.  They are closer to Trump on the issues than they are to Hillary Clinton, IMO.

[Fuzzy Bear]

Donald Trump is a populist.

On the political spectrum, he is a defensive nationalist.

He wants to isolate the US from those he sees would cause harm.

Chinese trade
Mexican illegal immigration
Islamic terrorism

This is part of the secret to Trump's success.  Seen in these terms, he wants things everyone can agree with, and makes them top priorities.  The Democrats are in a position where they appear to be more concerned with not appearing to be racist and xenophobic then about the safety of ordinary Americans.  A party that comes off this way will have trouble when push comes to shove.