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At least three semi-serious candidates are challenging President Trump for the 2020 Republican nomination. Is that weird? How common are primary challenges to incumbent presidents? What does the history tell us about how to think about this year's crop?
By Professors Casey Dominguez, Cory Gooding, and Timothy McCarty, University of San Diego4.9
4040 ratings
At least three semi-serious candidates are challenging President Trump for the 2020 Republican nomination. Is that weird? How common are primary challenges to incumbent presidents? What does the history tell us about how to think about this year's crop?