Europe has the money and the artillery shells, but key U.S. capabilities like operational intelligence and air defense would be difficult to replace.

Karol Nawrocki's victory underscores the enduring appeal of nationalist rhetoric among about half of the country along the eastern flank of NATO and the European Union.

The right-wing Law and Justice party’s faith in Karol Nawrocki, a conservative historian and former boxer with little political experience, proved well-placed in this week’s Polish presidential elections.