Yes, Feinstein is the oldest U.S. senator. But she should be able to retire on her own terms

California Sen. Dianne Feinstein says she hasn't thought about retiring soon despite some assertions that the 87-year-old lawmaker should step aside because her cognitive abilities have allegedly declined. "No, I haven't," she told me in response to a brief question about whether she'd considered retiring early. Her fifth full term doesn't expire until the end of 2024 when she'll be 91. There are also six other octogenarians in the Senate -- all men. The universal assumption is Feinstein won't run for reelection when her term is up.