House Democrats have unveiled a long-awaited proposal on healthcare reform. Democrats say the plan would expand health insurance to 37 million people over the next decade, ensuring coverage for 97 percent of Americans by 2015. The uninsured would get insurance under an expanded Medicaid program or through federal subsidies to purchase mandatory coverage. The plan would be largely funded through a surtax on Americans earning over $350,000 a year. But the government would also pay for the plan by reducing spending on federal health programs such as Medicare, which covers the elderly and disabled. The plan has little support in the Senate, where Democratic leaders are expected to advance a different proposal without the House surtax.