Dianne Feinstein returned to the Senate last month after a prolonged absence due to poor health and as questions continue to grow about her fitness for office. Feinstein said she would resume her duties with a lighter schedule, but the 89-year-old senator is reportedly suffering from mental decline that leaves her heavily reliant on her aides. Congressmember Ro Khanna of California is among a growing number of Democrats who have called on Feinstein to retire. “The reality is that she’s not able to do the job,” says Khanna. “She just has a staff that’s running everything, and it’s a very, very sad situation.”