4 of the last 5 US victories on American soil occurred at courses south of the Mason Dixon line. Why does the PGA of America continuously schedule the event for northern venues(Hazeltine '16, Whistling Straits '20, Bethpage '24)?
At this time of year the weather in the southern part of the US is nearly perfect and the courses have not yet come down from their summer high in conditioning. It seems like an easy decision and something the PGA must have been aware of in the past, between 1951 and 1983 8 of the 9 US Ryder Cups were held at southern courses.
20 Ryder Cups have been played in the states, the US is 6-4 when playing in the North and 10-0 when playing in the South. Clearly the easiest way to win is to move the event to Pinehurst!