America's flu vaccine shortage has become a campaign issue, with Sen, John Kerry blaming President Bush for failing to take steps to assure a reliable supply of shots this year. That's a typical Kerry tactic: Blame the president for a problem he's been trying to solve — and which Kerry and other politicians created.... The answer is that Congress decided 10 years ago to have the government buy up most of the vaccines at fixed, below-market prices. The Vaccines for Children Program, established by the Clinton administration and a Democratic Congress in 1994, federalized much of the once-private U.S. market...