 Complete the following phrase:  The first major championship at Congressional was the U.S. Open in 1964, won by Ken Venturi in oppressive heat with a score of two under par in the last Open to finish with two rounds on Saturday. A dozen years later, the PGA Championship was held at Congressional in 1976. With the course playing as a par 70, 1970 champion Dave Stockton sank a par-saving putt on the 72nd hole to win his second PGA Championship by one stroke at 281 1. The second U.S. Open at Congressional was played in 1997. Ernie Els, the 1994 champion, won his second U.S. Open with a score of four under par. The Blue Course hosted the U.S. Open in 