British and French elections promise dramatic turnover. Will aid for Ukraine falter?

The political experts call them “change elections,” and they often cite two powerful examples: Britain’s 2016 vote to jettison its decadeslong membership in the European Union, and Emmanuel Macron’s out-of-nowhere triumph in France’s presidential election a year later.

Now, however, we are days away from a different kind of change election in both countries.

“ election” might be a better term, because voters are poised to deliver a thundering rebuke to Britain’s Conservative Party, the architects of Brexit, and to the centrist party that Mr. Macron