WASHINGTON — The House has passed legislation that would provide full Social Security benefits to millions of people, pushing it one step closer to becoming law. The Social Security bill on Tuesday won bipartisan support in the House, 327-75, in what is now the lame-duck period for Congress. The bill now heads to the Senate, where passage is not assured despite considerable support. Here’s what to know about the legislation and what could happen next. WHAT DOES THE BILL DO? Decades in the making, the bill would repeal two federal policies — the Windfall Elimination Provision ...