" I also read that Eisenhower had Jewish ancestry, as did a couple of other presidents, although I can't remember which ones right now."

According to my wife, who is Dutch, Jewish, and also something of a genealogical buff, three consecutive presidents, FDR, Truman, and Ike, had some Jewish ancestry; of course, Teddy Roosevelt would be included too.

Barry Goldwater was, of course, half Jewish and, according to the man himself, when once denied admittance to an exclusive golf course, protested that he should be allowed to play nine holes!