In a recent analysis, Kyle Kondik, of the University of Virginia's Center for Politics, said the presidents and their parties in the three other races benefited "from some sort of extraordinary occurrence."
A tale of two July Fourths: No fireworks for Democrats this year
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Kyle Kondik, the managing editor of Crystal Ball, said its pollsters and political scientists would not be deterred from jobs.
Va. GOP demands ethics probe of polisci heavyweight Larry Sabato's 'bitter partisanship' on Twitter
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