Donald Tusk recently returned to Brussels as a “proud Pole” and a “proud European.” It is not quite clear which ascription comes first. Equally unclear is the capacity in which Mr. Tusk voyaged, for he is not yet Poland’s prime minister. Yet what is clear is that should Mr. Tusk assume the role, Poland could well see “more Paris in Warsaw,” as Mr. Tusk told President Macron of France last year — and likely not the good parts.

The October 15 Polish election saw the incumbent Law and Justice party come in as the largest party, taking 194 seats. It is, however, doubtful whether Law and Justice can find enough partners to secure the needed 231 for a parliamentary majority. Together with the center-right Third Way and the Left, Mr. Tusk’s Civic Coalition would have 248 seats in the 460-member lower house.