Fivethirtyeight.com, a company that aggregates the results of many polls, has Trump's popularity on a decidedly downward curve.

Figures are now 36.8% approval, 57% disapproval.

At his January inauguration, they were 45.5% approval, 41.3% disapproval.

https://projects.fivethirtyeight.com/trump-approval-ratings/?ex_cid=rrpromo