It's the latest indication that the frontline NATO nation is increasingly considering nuclear protection as fears of Russia grow.

Polish President Andrzej Duda has called on the U.S. to move some of its nuclear arsenal to Polish territory to deter potential future Russian aggression. Why it matters: The move would likely anger Moscow,

As President Trump casts doubt on U.S. alliances, Poland needs to double its military manpower and consider more destructive weapons, Prime Minister Donald Tusk said.

Poland's president has called on the U.S. to transfer nuclear weapons to its territory as a deterrent against future Russian aggression, the Financial Times reported on Thursday.

"The borders of NATO moved east in 1999, so 26 years later there should also be a shift of the NATO infrastructure east. For me, this is obvious," Polish President Andrzej Duda said.

Andrzej Duda believes Donald Trump could relocate U.S. nuclear warheads from Western Europe or the U.S. to Poland. He recently discussed the possibility with U.S. Special Envoy for Ukraine Keith Kellogg.