WASHINGTON — It's almost as if Sen. John Kerry never stopped running for president. He still jets across the country, raising millions of dollars and rallying Democrats. He still stalks the TV news show circuit, scolding President Bush at every turn. His campaign Web site boasts of an online army of 3 million supporters. The Massachusetts Democrat, defeated by Bush in 2004, insists it is far too early to talk about the 2008 race, but some analysts assume he has already positioning himself for another shot at the White House. "Obviously, Kerry has all but said he wants another crack...