Why does he have “the best methodology”?
His “methodology” has been consistently wrong about Trump. He said that Trump was unpopular and would not be taken seriously. He said that Trump would not get the Republican nomination.
The MSM calls Silver “freakishly accurate”. That is because he is one of their favorites.
Other posters have noted that his reputation is based on having inside information from Obama in the 2008 and 2012 elections. Probably information on voter fraud.
I noted that in my post. Nate Silver noted it as well.
So why do I like Nate Silver's "Methodology"? Partly and maybe mostly because in 2012 he made the call on all 50 states and got ever single one of them right. Nobody else did that.
I also like him because he is not a Pollster. He uses other peoples polls and picks them apart and weighs their value to build an overall model of the election. He compares the sample set for each of the polls vs. what he expects for the turnout of D vs R vs I and makes adjustments to each poll. Then he weights them based on his view of their relative value and then averages them.
IMHO that is as good as you can do given the biased crap we have for polling. The Pollsters are mostly Dem Favoring Crooks (IMHO). Nate Silver is certainly a Lib but he was good in 2012 and I expect him to be good in 2016. I also expect Trump to win.