35% against Trump in the primary is probably the largest we've seen.
I'm not sure about other polls that are framed as "Trump" vs. "Not Trump" without naming the alternatives. But for polls that actually name potential alternatives in the primary, Trump is *not* as high as 65% in most of them. E.g., the Morning Consult poll that came out just a few days before this one is here:
https://talkelections.org/FORUM/index.php?topic=424062.0And it has Trump at 42%, and other Republicans combined at 48%, with the rest undecided.