SO FAR unscathed by rumours of a two-year-long affair with a 24-year-old journalist, the United States senator John Kerry could be just 24 hours away from sealing victory for the Democratic Party presidential nomination. His crushing victories in the Nevada and Washington DC caucuses on Saturday, have tightened his grip on the nomination. Tomorrow’s primary in Wisconsin may be the last realistic chance Senator John Edwards and Howard Dean have of stopping his march to victory. It is likely that only a major crisis or embarrassment can now prevent Mr Kerry from winning the right to challenge George Bush this...