'Putin was looking for the federalization of Europe and we're gonna get the NATO-zation of Europe,' Biden said when he met with NATO Secretary General Jens Stoltenberg upon his arrival at NATO headquarters on Wednesday morning.
'And that's exactly what he didn't want to do - it's exactly what needs to be done to guarantee security for Europe. And I think it's necessary and I'm looking forward to it happening,' the president said.
Biden will meet with Turkish President Recep Tayyip Erdogan on Wednesday afternoon on the sidelines of the NATO summit.
On Tuesday evening, after multiple rounds of talks, Turkey lifted its objections to the two Nordic states joining the alliance.
'I am pleased to announce we now have an agreement that paves the way for Finland and Sweden to join NATO,' Stoltenberg said that evening when he announced the deal.
'Turkey, Finland and Sweden have signed a memorandum that addresses Turkey's concerns, including around arms exports and the fight against terrorism,' he added.
The three nations agreed to protect each other's security as Europe faces its worst security crisis in decades in the wake of Russia's invasion of Ukraine.
In order to affirm the new members, NATO's 30 allied parliaments must ratify the decision by leaders, a process that could take up to a year.
In its objections, Turkey wanted Sweden and Finland to stop supporting Kurdish militant groups present on their territory, and to lift their bans on some sales of arms to Turkey.
Under the terms of the deal, Stockholm will intensifying work on Turkish extradition requests of suspected militants and both Finland and Sweden will work on amending their laws to toughen their approach to them.
Stoltenberg said both Nordic nations would lift their restrictions on selling weapons to Turkey