DENVER (AP) - Barack Obama aims to weave the personal with the political Thursday as he explains to 75,000 supporters in a massive stadium - and millions more at home - how as president he would make a difference in their lives. The sweep of history provided weight to words yet spoken The previous evening Obama became the first black man to be a major political party's presidential candidate, and his acceptance of the Democratic nomination comes on the 45th anniversary of Martin Luther King Jr.'s "I Have a Dream" speech . Click to Read More ... Obama seeks a personal touch within a huge stadium