US National Security Advisor Jake Sullivan said on Tuesday from Vilnius that the White House welcomed "President Erdogan's commitment to transmit Sweden's accession protocols for ratification".
NATO Secretary General Jens Stoltenberg announced on Monday night that Turkey had agreed to forward Sweden's accession protocol to the parliament and ensure ratification.
"While this deal was, of course, the product of direct talks among the three parties to that agreement, NATO, Turkey, and Sweden, the United States had significant recent engagement with everyone involved", Sullivan added.
Ankara had been holding up Sweden's application to join the alliance accusing Stockholm of harboring Kurdish activists that Ankara regards as terrorists.
The historical agreement came after Erdogan paused his talks with Stoltenberg and Swedish PM Kristersson for a side meeting with Charles Michel, president of the European Council.
Michel said they had explored paths to re-energize the relationship between the bloc and Turkey.
Ankara has been a formal candidate to join the EU since 2005 but talks have been stalled for years.
"President Biden has long been on the record supporting Turkey's membership in the European Union. The United States continues to support Turkey in getting on the path to membership to the European Union and is seeing talk s between the European Union and Turkey unfold in a way that is constructive for both sides", Sullivan said.
The last-minute talks and Turkey change of hearts regarding Sweden's bid to join NATO has also open the way for Washington and Ankara to negotiate the sell of 40 new Lockheed Martin Corp F-16 fighter jets.
"The President has said all along that he is interested in getting these F- 16s to Turkey, and he is back that up by actually sending the package to the Congress. And so we will work with the Congress on the appropriate timing for getting them to Turkey", added the national security advisor.
