Germans are obsessing over the contest on newspaper front pages, in countless podcasts and in a string of documentaries with titles like “Crazy Trump and the American Catastrophe.” Australians are working out their worries by gambling on the outcome, with the odds tilting heavily in Mr. Biden’s favor.

And in Ukraine, where Mr. Trump’s demand for political dirt on Mr. Biden got him impeached, some are worrying that in a close election he could press President Volodymyr Zelensky for another favor, a congratulatory message to bestow legitimacy on a premature claim of victory…

No country has watched the American election unfold with greater anger and grievance than China — and few have more at stake. Tensions over trade, technology and the coronavirus have brought relations to their worst level since Washington first recognized the People’s Republic in 1979.

Even so, few Chinese officials appear to harbor much hope that a defeat for Mr. Trump would usher in any improvement. Rather, given Mr. Biden’s increasingly hawkish “get tough on China” campaign rhetoric, they seem to be treating him as a more complicated challenge.