Just catching up.
Was there a mention of one poll?
How about many polls? The average gives less than 40% approval and just under 55 disapproval. And the extremes (which are usually discarded):
Reuters/Ipsos 6/23 - 6/27 1620 A 35 58 -23
FOX News 6/25 - 6/27 1017 RV 44 50 -6
www.realclearpolitics.com/epolls/other/president_trump_job_approval-6179.html
Notice that FOX news universe is smaller than Reuters, and among registered voters (it seems going down by the minute), and Reuters among adult Americans. Reuters online and Fox by phone.
Note on the Reuters poll that Healthcare is rising fast for "Main Problem Facing America", above the Economy and jobs.
Reuters also shows Disapproval among Republicans and Independents as, respectively, 20% and 65%.
Strongest reasons for disapproval:
"The way he treats people like me" and The environment, at a total of 58%
Healthcare Reform
Strongest reasons for approval:
Dealing with ISIS - and the only one with higher approval than disapproval. (people like bombings, it seems, even if they do little)
www.realclearpolitics.com/docs/Core_Political-Topline-2017-06-28.pdf
In both polls, I think the most significant is that the percentage who Strongly Disapprove is quite high, and higher than less strong categories, even among Republicans (Reuters, as I didn't see it in Fox).
www.foxnews.com/politics/interactive/2017/06/28/fox-news-poll-june-28-2017.html