Obama, Dems Keep Pushing Claims on GOP's Secret Donors

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Campaign spending by independent groups could set a record of $500 million in this year's mid-term elections.  Where is the money coming from?  Are multiple TV spots and the Internet allowing candidates to campaign and hide out at the same time? Also, Guantanamo detainee Ghailani goes on trial in New York City federal court, and for the first time, researchers have injected embryonic stem cells into a human patient. We hear about the medical hopes and fears and the ethical objections.

Banner image: Deputy Chief of Staff Karl Rove (L) and White House counselor Ed Gillespie make their way to a farewell reception for the Director of the Office of Management and Budget Rob Portman August 1, 2007 in Washington, DC. Photo: Kevin Dietsch-Pool/Getty Images