He needs to win the crowd in the US where politics has turned into a pond so shallow you could throw in a pebble and it wouldn't sink.
(Yes, you could argue that these interviews address the entire world and everyone who is willing to listen to them, not just the US)
We know about manipulative narratives and low media literacy, people don't listen but absorb impressions and sentiments, and they don't translate well if what is spoken isn't clear.
Even I don't understand the stuff he says half the time and I try to listen as carefully as possible. I admire the courage of this man, but I think he is doing himself a disservice going to these interviews without a translator. Reading a speech from piece of paper in front of a couple of benevolent EU MPs is a different matter.
Imagine being a US. citizen with an ocean between themselves and the conflict. Of course these interviews do not address voters in the deep south, but who he is trying to reach? The general public? Just my humble opinion.
If politics is (sadly) to a large part about appearance, I'm not sure if these interviews help him.