"The notion that somehow not talking to countries is punishment to them -- which has been the guiding diplomatic principle of this administration -- is ridiculous."
Obama cited the diplomacy of late presidents John F. Kennedy and Ronald Reagan, who engaged the Soviet Union even as he called it the "evil empire."
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Charles Kupchan with the Council on Foreign Relations said that Obama and Clinton were essentially saying the same thing, which is that dialogue is important. "Talking face to face with a head of state, even if that state is a 'rogue' nation, doesn't mean that you give any ground," Kupchan said. "It is simply a way of opening the corridors of communication."
He noted that although the Bush administration took office vowing not to talk to North Korea or Iran, it reached a deal on North Korea's nuclear program through negotiations and now is sitting down with Iran to talk about the violence in Iraq.
"At the end of the day, history suggests that only if we talk to our adversaries do we resolve disputes," Kupchan said.