SAN JOSE, Calif. -- Former Vice President Al Gore is basking in the global spotlight for nominations for the Nobel Peace Prize and an Oscar, but a growing number of Democrats want him to make another bid for the presidency. He says he is interested in a "different kind of campaign to try to change enough minds" to solve the global-warming problem, but that doesn't stop people from asking. Mr. Gore spoke to 1,500 Silicon Valley leaders gathered Friday for the annual "State of the Valley" conference, hosted by Joint Venture: Silicon Valley Network. The audience sent the Democrat questions...