Yeah... as soon as i saw that Trump's approval was 46/52 I knew this was junk.
Well, these numbers are still far more plausible than those of Quinnipiac (38/58) and most people on this forum consider Quinnipiac as a very reliable pollster
Suffolk and Quinnipiac are almost mirror images of each other. They're both university pollsters that are quite good, although not of the very top rank IMO. Quinnipiac has a D lean while Suffolk has an R lean. Average the two, and the result will probably be close to reality.
You're right. An average of these two polls yiels 42-55, which is almost exactly the 538 margin.
I'll be following that tip in future, thanks GeorgiaModerate.