Both Russian President Vladimir Putin and his Belarusian counterpart Alexander Lukashenko said last month that Moscow had already shipped some of its tactical nuclear weapons to Belarus after announcing the plan in March. The U.S. and NATO haven't confirmed the move.
Comment: Exactly, it's old news, and a reasonable move considering the US has nuclear missiles sites in at least 6 European countries.
NATO Secretary-General Jens Stoltenberg denounced Moscow's rhetoric as "dangerous and reckless," but said in July that the alliance hadn't seen any change in Russia's nuclear posture.
Tactical nuclear weapons are intended for use on the battlefield and have a short range and a low yield compared with much more powerful nuclear warheads fitted to long-range missiles. Russia said it would maintain control over those it sends to Belarus.
Officials in Moscow and Minsk have said that the warheads could be carried by Belarusian Su-25 ground attack jets or fitted to short-range Iskander missiles.
Duda made his comments at a joint news conference with visiting Portuguese President Marcelo Rebelo de Sousa.
"I was telling President (de Sousa) about the implementation of the declarations by Vladimir Putin that Russia's tactical nuclear weapons will be moved to the territory of Belarus," Duda said. "Indeed, this process is taking place, we are seeing that."
Duda gave no details, but said that in an "obvious way it is changing the architecture of security in our part of Europe."
"It is changing the architecture of security in our immediate neighborhood, but also of the eastern flank of NATO, at the same time. So in fact it is changing the situation for all of the alliance," he said.
Comment: More than anything, he sounds worried, because these moves show how paralysed the West is to do anything substantial in response.
Lukashenko said that hosting Russian nuclear weapons in his country is meant to deter aggression by NATO member Poland, even though Warsaw has made no such threats.
Comment: The leadership in Warsaw have shown more than once that their delusional designs make them a liability: Putin: 'If Poland's troops enter Ukraine, they will remain there... forever'
Poland is offering neighbor Ukraine military, humanitarian and political backing in its struggle against Russia's invasion and is taking part in international sanctions on Russia and Belarus.
Duda also hailed the recent approval by the U.S. State Department of the potential sale of 96 Boeing AH-64E Apache helicopters to Poland that would lead to a huge boost in Poland's and NATO's defense potential and was a sign of special relations between Washington and Warsaw.
Comment: Meanwhile a number of experts are predicting that the proxy war in Ukraine have revealed NATO to be pretty much redundant, and it may not last longer than another 18 months: Retired US colonel says Ukraine 'will lose' in conflict against Russia, 'NATO will fall apart in 18 months'
De Sousa pledged continuing support for Ukraine's struggle and for other countries in the region, saying the situation on Europe's eastern borders is as important to Portugal as that in its own neighborhood.
Comment: Meaning that De Sousa is encouraging the Ukraine meat grinder, that has claimed over 280,000 lives, to continue.
"We are united, we stand in solidarity, without any hesitations and I have duly taken note of the Polish concerns over what may be understood as the need to be closely watching any moves that may question the eastern borders of the European Union or of NATO," de Sousa said.
"We are vigilant, we stand in solidarity and we are operational," de Sousa said.