The article is devoted to the efforts implemented by the Democratic administration of U.S. President Joe Biden to strengthen NATO and the ties within the organization. The strategic documents adopted by Washington and its practical steps taken for these purposes are analyzed. The efforts of the American leadership under Joe Biden and Kamala Harris to implement the declared course towards NATO consolidation are considered in several main aspects, i.e.: the rapprochement and divergences between the allied countries and the development of the alliance’s new global posturing; their joint military and political measures to counter Russia after the start of its special military operation; the pursuit of further NATO expansion by admitting Finland and Sweden; and the influence of the U.S. election campaign on Washington’s policy towards NATO. The line of the Democratic administration to strengthen ties with the allies is analyzed in juxtaposition to the actions and statements of the Republican leader Donald Trump, both during the election campaign and after his victory in the elections. The piece examines changes in NATO strategy defined by its confrontation with Russia and the efforts of the alliance’s members to ensure the organization’s sustainability regardless of political and financial developments due to the political transition in Washington.