Dianne Feinstein’s colleagues are concerned the 88-year-old senator is struggling with memory loss, reports Tal Kopan of the San Francisco Chronicle. It’s raising concerns about Feinstein’s ability to do her job and the aging of America's politicians.

This episode was produced by Haleema Shah, edited by Matt Collette, engineered by Efim Shapiro, fact-checked by Laura Bullard, and hosted by Noel King.

Transcript at vox.com/todayexplained

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