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.
What the hell are you talking about?
Here's a basic political spectrum:
<---------|-----------------|-----------------|--------------------->
Sanders Clinton Trump
In what world is Sanders closer to Trump on the issues than he is to Clinton? Unless you're claiming that Trump is to the left of Clinton.