I’ve never understood why anyone would not release their “internals” if they’re ahead.
Internals are for the campaign only. If they are ahead or behind either way they are just what the name says they are. All you’ll ever get are winks and nods that are off the record and non-specific, so that supporters won’t get demoralized by believing ginned up polls for the Democrats.
You don’t want the bitter opposition to have anything you hire researched for your eyes only. In order to “prove” the validity of anything you release, you would have to include the details of what you’re doing. That’s politics, to not let them in on the nitty gritty, good or bad for your side.
That internal polls aren’t officially and precisely released doesn’t concern me at all.