Under attack from Democratic rivals, can Elizabeth Warren hold on to her new front-runner status in the 2020 presidential primary? The columnists discuss the fallout from the fourth primary debate, where all the attention was on the senator from Massachusetts, and where the race could go from here. Then, “The Argument” celebrates its first birthday! After a full year of disagreeing with each other weekly, the columnists reflect on moments in their careers where their own minds changed. 

For background reading on this episode, visit nytimes.com/theargument.

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