Duda is not nationalist and even his conservatism is highly doubtful (former member of Freedom Union which was everything but conservative). He wants to attract conservative voters, thus dose of conservative rhetoric that he need to use. The same about EU-sceptism, Polish politicians are paid by the EU and they like high salaries.
Political formation that he represents used to bully Russian regime even before Ukrainian war started or plane with president Kaczynski crashed.
They used to be Jewish and American friendly, so if I would be an American I would be happy with that outcome. His oponent party is more pro-German. Duda spoke that he want NATO bases to be moved from Germany to Poland, regretted that anti-missle shield plan was abandoned.
Duda won presidency because he made many empty and costly promises. In election campaign they are populist socialists but their policy would be just bureaucratic technocracy. Nothing really interesting. Only value is that they would not force leftist agenda with gay marriages and similar ideas.
Thank you for the local perspective. I would only note that his political trajectory is still salutary, from Freedom Union to Law and Justice. If he is strongly pro-life and Catholic, that is the definition of both nationalism (for Poland) and conservatism. Bullying the Russians is a bonus; they fully deserve that. I understand that European vocabulary differs from the American on that.
I am not a fan of democracy of any description, so my expectations as regards elected politicians are low.