WASHINGTON — Top Democrats tentatively agreed on a plan that would fast-track President Barack Obama’s health-care initiative and ensure it couldn’t be bogged down by a Senate filibuster. The health-care protection would be at the heart of a compromise version of the fiscal 2010 budget, which Democratic leaders in the House and Senate hope to push through both chambers early next week. That would provide Mr. Obama with a symbolic victory in time to mark his 100th day in office Wednesday. Congressional aides who described the deal Friday cautioned that a few details of the blueprint remain to be finalized, including the amount of spending on education. But they stressed that the essential framework of the budget had been hammered out in a late-night negotiating session Thursday, and top Democrats were busy Friday briefing colleagues. Even after a budget is adopted, action will be required on separate legislation to spend the money on specific items. But the outline is significant, particularly in the legislative protections it confers on priorities such as Mr. Obama’s health-care plan. Overhauling the nation’s health-care system is a top Obama goal, and Democrats in the House and Senate are determined to begin […]