Robert Kennedy Jr. is set to announce his running mate this week. To mark the occasion, Semafor’s Dave Weigel explains whether third-party options can move the needle.

This episode was produced by Miles Bryan, edited by Amina Al-Sadi, fact-checked by Anouk Dussaud and Laura Bullard, engineered by Patrick Boyd, and hosted by Sean Rameswaram.

Transcript at vox.com/todayexplained

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