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Read: Joe Biden's remarks as prepared for delivery in Iowa
Biden gambles on high-risk primary strategy
By Natasha Korecki & Marc Caputo
Trump Needs a Target to Stay Interested in His Campaign. For Now, It's Biden. (Published 2019)
By Maggie Haberman & Annie Karni
Joe Biden says he'll 'cure cancer' at campaign stop in Ottumwa, Iowa
By Nicholas Wu
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Trump says Biden's a 'failing' 'dummy' who 'looks different than he used to'; Biden calls him an 'existential threat'
By Allan Smith & Garrett Haake
It's not just Trump questioning Biden's age. Democrats are, too.
By Marc Caputo & Natasha Korecki