It’s been cut in half, according to Reuters:

Clinton led Obama 38 percent to 27 percent in the new poll, a 10-point fall from her 46 percent to 25 percent lead last month. The drop followed a month of attacks on the New York senator from her rivals and a heavily criticized performance in a late-October debate.

My essay about the transformational potential of Obama candidacy – "Goodbye To All That" – can be read here.