A Gore candidacy? The return of Elizabeth Edwards' cancer changes the dynamics of the U.S. presidential race. Specifically, it strengthens the likelihood of an Al Gore candidacy. Despite the torrent of scientific media reports on the improved outcomes for bone-cancer patients that followed John and Elizabeth Edwards' joint announcement earlier this month that her cancer had returned only two years after Ms. Edwards' fight with breast cancer, the realistic prognosis cannot be optimistic. Should her condition noticeably weaken in the nine months before the primary season begins, Edwards will drop out to be constantly with his wife and two small...