Republican lawmakers tried to slow momentum for expanding a children's health insurance program by arguing that a bill in the Senate would draw about 2.4 million children away from private insurance into government-sponsored coverage. Sen. Jon Kyl, R-AZ, said the legislation does not do enough to limit the State Children's Health Insurance Program to low-income families. He said about a third of those who gain insurance as a result of the bill would otherwise have access to private insurance.