Al Gore will have a prime time audience when he officially endorses Sen. Barack Obama for President of the United States tonight at 8:30pmET in Michigan. Shepard Smith on FNC and David Shuster on MSNBC broke the news at 3:03pmET, with MSNBC originally citing a New York Times report. CNN's Don Lemon reported the news at 3:23pmET, using AlGore.com as a source. How will the cablers/networks cover the event as prime time begins tonight?