This summer issue of "The Rhodes Cook Letter" takes a look at the outsized, even historic, role that President Donald Trump is playing in the 2018 midterm election.

Rhodes Cook is a former political writer for Congressional Quarterly, where he covered presidential and congressional elections from 1975 to 1997. Since then he has worked independently, writing biennial editions of America Votes over the last two decades, as well as several books on the presidential nominating process. He also writes a political newsletter, "The Rhodes Cook Letter," columns for Sabato's Crystal Ball, and at various times blogs for The Wall Street Journal's online edition.

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Photo of Charlie Cook