Connecticut Gov. M. Jodi Rell has vetoed a controversial "pooling" bill that would have allowed municipalities and small businesses to join the state's health insurance plan. The measure generated a battle between state employees' unions and their longtime opponent, the Connecticut Business and Industry Association. Union leaders said the pool would be a major step forward for healthcare, while CBIA said it was simply the first step toward an expensive, taxpayer-supported, single-payer system.