Medicare spending is projected to grow by 3 percent in 2018, which is slower than in recent years, partly because more seniors will pay their full Part B premiums this year, according to the Congressional Budget Office. CBO also expects federal spending on Medicaid to grow at one of the slowest rates since 2012. “The jump in receipts from premiums stems largely from increases in how much many beneficiaries will actually pay for their premium for Medicare Part B,” a...