On his Blog he wrote some insightful articles about how and why Trump will win. Unlike the mainstream media, he got it right. So I count at least two accomplishments.
Regardless, American media makes for an abysmal benchmark.
He also doubled-down - with qualifications - once Trump secured the nomination. Almost everyone else - including myself - saw the general election as a Clinton shoo-in, given Trump's numerous deviations from what most of us had believed were political candidate social norms, among other apparent disadvantages.
I wouldn't say he has insight to American but rather human psyche and its biases, which you should know if you've read his articles.