SACRAMENTO -- A controversial measure that would provide $3 billion in state bond money to pay for human embryonic stem cell research holds a narrow margin of support among voters, according to a new Field Poll. Proposition 71, designed to get around the Bush administration's funding limits on such research, would authorize the state to sell bonds to provide annual payments of about $300 million to scientists and companies doing stem cell research. The poll found that 46 percent of likely voters support the idea with 39 percent opposed and 15 percent undecided. The margin of error was 4.3 percentage...