Is the impeachment of Donald Trump finally just a matter of time? The columnists discuss how the president’s attempt to pressure a foreign government to undermine a political rival quickly turned a progressive pipe dream into an inquiry backed by most House Democrats. Then, the other 2020 primary: three eclectic Republicans running to unseat the incumbent president of their own party. What do their quixotic campaigns say about the state — and the future — of the G.O.P.? 

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