if primaries are open in almost half the states then that means they are closed in half the states. That means a poll of registered voters that doesn’t take this into account is way off. Perhaps they take this into account — I have no idea. My original comment was that the article simply said “registered voters”.
Well, I don’t intend to be mean, but you tend to be a bit clueless. You didn’t even know your own state has an open primary and it has been a festering issue for years. And you feel qualified to interpret a poll that you know nothing about?