After a disastrous debate performance in June, the chorus of questions and doubts have been steadily building — is Joe Biden really the man to beat Donald Trump in this Fall's American presidential election? Biden himself has finally answered: no, he's not. On Sunday, he announced he wouldn't be seeking re-election in November, and nominated his vice-president Kamala Harris in his stead.

What's next for the Democrats, and what does it mean for an already chaotic election? Washington Post political reporter Patrick Svitek breaks it all down.

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