The fifteen point net disapproval reflects the bleakest picture for the president since December, 2017. Rasmussen, whose results tend to skew positively for the president, also found that 30 percent of respondents strongly approve of Trump while 47 percent who strongly disapprove, his worst rating since January 2018.
Both 538 and RCP also show Trump in a serious and sharp decline analyzing many polls.
Now for the kicker. Rasmussen, as stated above, is know to skew in Trumps favor due to methods and demographics. If you look at 538’s adjusted values in this poll 538 adjusted this Rasmussen poll from 42/57 (-15) against trump to 38/58 (-20) for Trump.
While this is just one poll the trend lines all point in this direction, Trump’s toast and the longer his republican enablers hang on to him the deeper they will all sink.