Some weeks ago the Economist said of Hillary Clinton: "She also has awesome stamina, an orderly mind, a terrific organisation and a will to power that would make Nietzsche sit up and take notice. "

Well perhaps we have seen some of this in the last few days, but what also has been seen is the Democratic party's fear of the untested nature of Obama, what he has most to thank for his lead is actually John McCain. Many Democrats feared that McCain would get core Republican support in a fight against a Clinton but not in one against Obama. Now I think many Democrats are worried that Obama's inexperience might also leave him vulnerable against McCain  as well.

Fundamentally, the Democrats cannot decide between these two candidates because, they are not sure which is the lesser risk. They are ahead in the opinion polls for the General Election in November, however, there is still time for that lead to slip. When you are ahead you tend to be cautious, the trouble is the Democrats aren't sure on the safe bet.