"didn't they insist he sounded like someone who spoke English as a second language?"
That's what I heard too. Listening today to the video...what American says TIE-ranny instead of tyranny? He doesn't sound American to me...listen close and you can pick up the "accent"
My cousin in San Diego says it that way.
Sounds plenty American to me
And in the video he sounds very immature and hotheaded, just like people describe him in real life.