Ziobro, a senior opposition politician from the Law and Justice (PiS) party, is currently in the United States, where Polish prosecutors are seeking him on charges including running an organized crime group and abusing his ministerial powers.
He is believed to have entered the US on a journalist visa, despite having hold no such a role.
Sikorski told Polish Radio that the foreign ministry had received a response from Washington regarding how Ziobro obtained his visa, describing it as "fairly formal" and referencing standard international procedures.
He drew a distinction between extradition treaties and the separate question of granting press credentials to someone who is, in his words, "vice-chairman of the main opposition party and a member of parliament".
"I would ask the president to demand that Zbigniew Ziobro be stripped of US protection, so that he can face prosecutors and judges in Poland," the foreign minister said.
The presidential spokesman dismissed Sikorski's comments as "tabloid politics", accusing the minister of deflecting from his own failures in foreign policy.
Nawrocki is travelling to Washington this weekend to attend a White House UFC gala marking both the 250th anniversary of American independence and President Donald Trump's birthday.
Sikorski said the Polish head of state has the government's full backing to press Trump on his pledge to send an additional 5,000 US troops to Poland.
The commitment has taken on added urgency following reports that Washington is planning significant cuts to its military presence across Europe.
According to the New York Times, the measures would reduce the number of F-16 and F-15E fighters available for NATO operations in Europe from around 150 to 100, slash maritime patrol aircraft from 26 to 15 and withdraw all air-to-air refuelling planes previously allocated to the continent.
Sikorski acknowledged the reductions were significant but not unexpected, noting that Europe ranks only fourth in US national security priorities.
(ał)
Source: PAP