From the BBC:
Ms Rice deplored Venezuela's close relations with Cuba
Venezuela's President Hugo Chavez is one of the biggest dangers facing Latin America, Washington has said.
US secretary of state Condoleezza Rice said Mr Chavez was trying to influence others away from democracy, and called for a united front against him.
President Chavez responded by accusing the US of aggression, saying "world opinion is with Venezuela".
The exchange would appear to undermine recent efforts to improve increasingly strained ties between the two states.