Older article but noted here because there have been some questions about this particularly regarding a recent poll that showed Obama leading among INDs and with 81% of the Dem vote (versus McCain's 85% of the GOP vote) and yet McCain lead in the top number by 4%. It made no mathematical sense. Ohio is remarkable for having 4 million INDS versus 2.5 million DEMS and about 1.5 million GOP. How Obama could lead in INDS in that poll and trail in overall numbers is mind boggling.
"As Ohio Democrats pack for their national convention in Denver next week, they have quietly rolled up an advantage that almost no one has noticed: nearly a million more registered voters than Republicans.
Almost three times as many Ohio voters have become Democrats as have become Republicans since the summer before the last presidential election.
William C. Binning, political-science professor at Youngstown State University and former Mahoning County Republican chairman, acknowledged that the surge of Democrats shows that the party is energized and motivated in Ohio -- and that Republicans have a lot of work to do.
"I certainly think it's a good sign for the Democrats," he said."
More at the link:
http://columbusdispatch.com/live/content/local_news/stories/2008/08/22/DEMVOTERS.ART_ART_08-22-08_A1_U8B3OT6.html