June 21, 2008 -- Awash in campaign cash, Barack Obama this week announced that he's opting out of the public-financing system for presidential campaigns. He'll be the first general-election candidate to do that since the system was set up. This gives new meaning to the notion of "politics of change." "In February 2007, I proposed a novel way to preserve the strength of the public-financing system in the 2008 election," he wrote in November. "My plan requires both major party candidates to agree on a fund-raising truce, return excess money from donors and stay within the public-financing system for the...