WARSAW - The United States will officially open a new air defense base in northern Poland on Wednesday, as Warsaw seeks to reassure citizens that NATO guarantees their security amid jitters after Donald Trump's presidential election victory.

Situated in the town of Redzikowo near the Baltic coast, the base has been in the works since the 2000s and Warsaw says it symbolizes the fact that its military alliance with Washington remains solid no matter who is in the White House.

"It took a while, but this construction proves the geostrategic resolve of the United States," Polish Foreign Minister Radoslaw Sikorski said in a video posted to X on Tuesday.

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"The Polish-American alliance is strong, regardless of who governs in Warsaw and Washington."

Polish President Andrzej Duda, a conservative who has stressed his warm ties with Trump, is set to attend the base opening ceremony. On Monday, he told reporters that Trump had called him with greetings for Polish independence day.

Trump's past criticism has unnerved some NATO members, as he has vowed that under his leadership the United States would not defend countries which do not spend enough on defense.

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However, Poland says the fact it is the alliance's biggest spender on defense relative to the size of its economy means it should have nothing to fear.