SEOUL North Korea intensified its nuclear confrontation with the United States on Tuesday, calling President George W. Bush "Hitler, Junior," while South Korea warned the Communist state against taking "extreme measures," in an apparent reference to a nuclear test. "It is a wise decision for our republic not to expect any settlement of the nuclear issue or any improvement in its relations with the United States during Bush's term of office," said the commentary in Rodong Sinmun. "Bush is the world's worst fascist dictator, a first-class warmaniac and Hitler, Junior, who is jerking his hands stained with blood of innocent people." The newspaper said Washington's threat of persuading the UN Security Council to impose sanctions against the impoverished country would not affect its determination to "stick fast to the path we have chosen." "The dog barks, but the caravan continues," it said.