[cnn-photo-caption image= http://i.cdn.turner.com/cnn/2008/images/05/20/art.obama.montana.gi.jpg caption=" Barack Obama will be on the Situation Room tonight."]
(CNN) - Sen. Barack Obama will respond to a tough new foreign policy criticism from John McCain in an interview with CNN’s Wolf Blitzer in The Situation Room.
This week, the presumptive Republican nominee has taken aim at Obama over his willingness to consider dialogue with nations hostile to the United States.
At a Tuesday campaign event in Miami, McCain attacked Obama’s position in favor of a possible relaxation of the Cuban embargo policy.
"These steps would send the worst possible signal to Cuba's dictators - there is no need to undertake fundamental reforms, they can simply wait for a unilateral change in US policy. I believe we should give hope to the Cuban people, not to the Castro regime,” said McCain. “My administration will press the Cuban government. The embargo must stay in place until these basic elements of democratic society are met."
In Chicago Monday, McCain criticized Obama for saying Iran did not pose the same threat to the United States as the former Soviet Union had.
“Obviously Iran isn’t a superpower and doesn’t possess the military power the Soviet Union had, but that does not mean that the threat posed by Iran is insignificant,” said the Arizona senator.
Watch Obama respond at 4 p.m. on CNN’s The Situation Room.