Trump wasn't there very long be he did hit about 31 on the RCP average. And, AFIK, RCP is the gold standard for poll averages. If there is a better one someone should point it out.
And, for the record, I'm not picking on Trump. Just pointing out the facts.
Here is the RCP data:
Odd. Note ALL turned down simultaneously, especially those at the top. Only Fiorina shot up briefly.
Trump is almost exactly where Obama was at this time in 2007.