It would appear that the following six courses are the USGA’s top tier US Open courses: Winged Foot, Pinehurst, Bethpage Black, Pebble Beach, Shinnecock, and Oakmont. Each of these is a great course which can test the best professionals, and has the proper facilities and size to host a U.S. Open.
Why does not the USGA do a modified version of the R & A’s rota. Visit 1 of each of these courses every other year over a 12 year span. Than in the in between years visit a variety of other courses able to hold the U.S. Open. Course such as Olympia Fields, Bellerive, Congressional, Cherry Hills, Atlanta Athletic Club, Oakland Hills, Oak Hill, Hazeltine, Crooked Stick, Southern Hills and Torrey Pines may not all be great courses, but they are very good courses. Additionally, each meets the other requirements for holding a U.S. Open, and keeping each in play for a visit at least once every quarter century allows the U.S. Open to visit a variety of other cities around the country. In this mix the USGA should try to get to the Northwest and the South (the pros can handle a little June heat). Also in this mix should be attempts to visit the great small courses, such as Merion, The Country Club, Olympic Club, Riviera, Colonial and Scioto for example.
The result would be going to the big six U.S. Open courses every other year, and then giving an occasional visit to a variety of 12 other courses over a quarter century span.