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Democratic Party

The two-track 2020 presidential campaign

The two-track 2020 presidential campaign

By virtue of the separate decisions of Donald Trump and Joe Biden to cast the approaching 2020 campaign as a bitter showdown between them, it already is reducing the large field of Democratic candidates to a premature sideshow.

When Messrs. Trump and Biden went to Iowa last Tuesday and exchanged barbs from separate locations, the other 22 Democratic hopefuls in the race could only shrug and continue to plod on in their lonely efforts to horn in on what so far has been the Trump vs. Biden main event.

Mr. Biden's strategy to cast next year's presidential campaign as a two-man race, with himself as the strongest Democrat to beat Mr. Trump, has been handed a major boost from Mr....