WASHINGTON — President Joe Biden underlined the strength of NATO as Finland and Sweden join the alliance, amid altered security architecture in the West following Russia’s invasion of Ukraine.

“Our alliance is closer than ever. It is more united than ever. And when Finland and Sweden bring the number of allies to 32, we’ll be stronger than ever — stronger than ever,” Biden said Tuesday as the United States ratified instruments for the Nordic countries’ accession.

Last week, large majorities of Democrats and Republicans voted in favor of enlarging NATO. Washington said the U.S. is the 23rd of the 30 NATO member states to approve the accession.

“In a moment when Putin’s Russia has shattered peace and security in Europe, when autocrats are challenging the very foundations of a rule based order, the strength of the Transatlantic Alliance, and America’s commitment to NATO is more important than has ever been,” Biden said.

Biden urged the other allies to complete their own ratification processes as soon as possible.

Finland and Sweden both put aside decades of neutrality to join NATO following Moscow’s invasion of its neighbor in February.

Before the accession protocols can enter into force, they must be ratified by the 30 NATO member states. It remains unclear whether Turkey will do so, as the only member to block the accession process.