i clicked a few links...
if they revealed there sample its very hard to find.
given this fact...
"What sets Trump apart isn’t a lack of support from his own party. About 87 percent of Republicans approve of his performance, several points above the average for previous presidents and similar to the numbers Obama and Bush saw at this point in their presidencies.
Rather, Trump’s ratings reflect the near-complete absence of support from Democrats, just 9 percent of whom approve of his performance so far."
its likely they had a rich democrat or leans democrat sample.
I rate this a most likely a very skewed probably fake poll.