Biden to offer cooperation to 'worthy adversary' Putin

"I will make clear to President Putin that there are areas where we can cooperate if he choses," Biden said on Monday after a NATO summit in Brussels.

"If he choses not to cooperate and acts in the way he has in the past related to cyber security and some other activities, we will respond, we will respond in kind," said Biden, who is to meet Putin on Wednesday in Geneva.

The U.S. leader also said the potential death of Russian opposition leader Alexei Navalny, now jailed in Russia, would be a tragedy and would hurt Russian relations with the rest of the world and with the United States.

"Navalny's death would be another indication that Russia has little or no intention of abiding by basic fundamental human rights, it would be a tragedy, it would do nothing but hurt relations with the rest of the world, and me," Biden said.