A crowd of nearly 500 in the Library Theater in Park City, Utah, stayed on through a standing ovation and into the question-and-answer session as Al Gore — one Kentucky reporter actually addressed him as "Mr. President," to laughs and cheers — restated his warnings about the "planetary emergency," global warming. Gore is the star of a documentary entered in the Sundance Film Festival, An Inconvenient Truth, and all the questions were for him. The director, Davis Guggenheim, stood quietly to his left; a bit farther away was the woman who made the film happen, Hollywood Democratic power player Laurie...