(Note - I find the music overlay in this clip enormously annoying.)
Ya gotta admit, the man can speak to the people:
But what's more important is that you KNOW, from the top of your head to the tips of your toes, that unlike a lot of politicians he completely believes in everything he says. Nothing is just "political expediency".
Now, whether you agree with his beliefs and goals is something else. But you've got to grant him honesty and integrity.