He added that economic penalties would increase if Russia escalates its threat against Ukraine.
Biden and NATO allies have said they’re prepared to impose severe economic sanctions on Russia.
Germany alsohalted approval of the Nord Stream 2, a key natural gas pipeline running from Russia to Germany.
The conflict has already had global economic consequences, withthe price of oil nearing $100 a barrelon Tuesday.
The admission of either country would increase the military alliance’s presence along Russia’s border.
Approximately14,000 people have reportedly been killedin ongoing conflicts in eastern Ukraine.