Neither. He is today’s Harry Truman.
If one examines his positions, that is where he lines up.
I’m going to disagree, but only as far as the electoral politics are concerned. Truman was a relatively unknown Senator when FDR picked to be VP for his fourth term. I can’t imagine any way he could have become a national figure otherwise. His handling of his duties after FDR died, got him his second term (although Dewey famously was overwhelmingly favored in the polls—that’s where the similarity is, and perhaps that’s what you meant).
Trump is like Jackson in that he is speaking for people who have been politically ignored for a long time. We’ll see how well he does this over the next four years.