Since taking office on August 6, Poland’s president Karol Nawrocki has stood in sharp opposition to Prime Minister Donald Tusk and his cabinet, drawn from a somewhat fragile coalition of center right and center left parties. Nawrocki’s challenge to Tusk primarily revolves around disputed judicial reforms, abortion rights, migration, and the role of the Catholic church — all emblematic of a conservative political and social agenda. But foreign and security policy differences matter as we...