Vladimir Putin has warned Joe Biden there would be a complete breakdown in relations between Russia and the United States if new sanctions were imposed because of tensions in Ukraine.
The Russian president said it would be a “colossal mistake” in a phone call with his US counterpart that ended early on Friday morning.
The two leaders spoke for 50 minutes after Putin requested the conversation, their second direct call this month.
Biden said economic measures would be taken if Russia were to invade
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