“Congratulations to Joe Biden for a successful presidential campaign”, Duda wrote on Twitter on Saturday, following announcements by major US media outlets that Biden had become the 46th president of the United States. “As we await the nomination by the Electoral College, Poland is determined to upkeep high-level and high-quality PL-US strategic partnership for an even stronger alliance,” Duda added.
Later on Saturday, Polish Foreign Minister Zbigniew Rau also congratulated Biden on Twitter. "Congratulations to Joe Biden and Kamala Harris on their electoral victory. We're looking forward to working with the new U.S. administration," Rau tweeted. He declared that Poland "remains determined to further develop Polish-US Strategic Partnership and strenghten transatlantic relations."
US ambassador to Poland Georgette Mosbacher earlier said that Polish–US partnership would not be affected by Biden’s victory as the US troops will stay, the energy contracts will be maintained and even the Three Seas regional initiative will continue to have US support.
Donald Tusk, president of the European People's Party and Poland’s former prime minister also offered his congratulations to the president-elect. “Trump’s defeat can be the beginning of the end of the triumph of far-right populisms also in Europe. Thank you, Joe,” Tusk tweeted on Saturday.
The news of Biden's unofficial victory finally came after more than three days of uncertainty as a record number of mail-in votes had to be sorted out, which delayed the process.