If you take what he claims at face value, pretty damned accurate. In this thread's article he speaks of his 45 year record. In this article from his web site, he claims 45 years and never a wrong call:
The answer is that in 45 years in politics, I have never been wrong about an election call even when I was called crazy.If true, that is awesome!
Of course the flip side is...
If this guy is so good, how come we don’t see him all over the TV? At least on Fox News.
I spent the time to go through Mr. Marston metholdogy which is fairly simple but it seems to be very valid.
Any people here really good in statistics that wants to review it?