Tim Murphy from Mother Jones explains how Sen. Kyrsten Sinema went from a left-wing activist to a Biden obstructionist.

Today’s show was produced by Will Reid, edited by Matt Collette, engineered by Efim Shapiro, fact-checked by Laura Bullard and hosted by Sean Rameswaram.Transcript at vox.com/todayexplained

Support Today, Explained by making a financial contribution to Vox! bit.ly/givepodcasts

Learn more about your ad choices. Visit podcastchoices.com/adchoices