Bloomberg: Obama leads in Ohio, Pennsylvania, Minnesota Polls <a href="http://www.bloomberg.com/apps/news?pid=20601087&sid=aM6wSrKwniy4&refer=home" target="_blank">http://www.bloomberg.com/apps/news?pid=20601087&sid=aM6wSrKwniy4&refer=home</a> Oct. 6 (Bloomberg) -- Democrat Barack Obama leads Republican presidential nominee John McCain in battleground states of Ohio, Pennsylvania and Minnesota, according to new polls.