Gov. Kate Brown, a Democrat, will be running for re-election in November against State Representative Knute Buehler, one of 10 Republican candidates.

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The three Republican front-runners were Mr. Buehler, who emphasized his willingness to buck Republican orthodoxy; Sam Carpenter, a businessman who positioned himself as the most pro-Trump candidate; and Greg Wooldridge, a retired Navy captain.

Ms. Brown herself technically had two primary challengers, but according to The Oregonian, neither had actively campaigned or reported any fund-raising, and there had been no debates. So foregone was the conclusion of the Democratic primary that Ms. Brown told The Statesman Journal that she was not focusing on the campaign at all, only governing the state.