According to the final iteration of the Reuters/C-Span/Zogby tracking poll, Obama's lead is being cut but it remains healthy. What is interesting is the strength of Edwards' support. Should he somehow beat Clinton back into third place this race would get even more interesting.
Two trends to watch in this poll - how many blacks will vote Clinton? And how many whites will vote Obama? Opinion polls suggest that Clinton is still attracting good levels of support from black voters but Obama is attracting only 10% support from white voters.
We will be analysing the results once they start coming in. Turnout is apparently heavy.
