Roosevelt went directly to the people .... President Trump does, too, in a way that meets the communications "challenges" of today.
It's very effective. Most here rely on sound bites and media reports, but these miss the essence. Trump really talks to the crowd. It's been said it's like he's sitting in your living room talking to you over a beer. And it's true.
The rallies have a pattern to them, recurrent themes, but they are first and foremost a conversation with the thousands in attendance. He doesn't preach, he discusses. And he relates. As I said, it's very effective.
I expect political science classes and political operatives from both sides of the aisle will study these rallies for years to come.