Nationalism vs populism vs thwarting democracy

What is nationalism?

I think that's a pretty basic question. And it has a fairly straightforward answer. But, in the wild, out on the campaign trail, it's less straightforward. For example, I often see references to Recep Tayyip Erdoğan as a nationalist.  For example, in May, here's the Voice of America with the headline "Turkey's Erdogan Ramps Up Nation…