‘Big mistake’: Biden condemns Putin’s withdrawal from nuclear treaty

You're the frontlines of our collective defense,' Biden tells Bucharest Nine group of eastern European countries on last day of trip

Joe Biden on Wednesday night condemned as a big mistake" Russian president Vladimir Putin's decision to suspend his country's participation in the last remaining US-Russia nuclear arms control treaty.

The comment came as the US president closed out his wartime visit to Europe, working to shore up partnerships with allies on Nato's perilous eastern flank - even as Putin was drawing closer to China for help as his invasion of Ukraine neared the year mark.