NPR's Mara Liasson is traveling with President Clinton on his trip to Europe. After leaving the G-8 summit, President Clinton spoke today in Slovenia, which was the first constituent part of the old Yugoslavia to break away and, as the president put it, reject Slobodan Milosevic. The President held Slovenia up as a model for democratic and economic progress in the Balkans and said it had earned consideration to join NATO in the next wave of alliance expansion. In what is certain to be regarded as a provocative move in Belgrade, the president meets with the western leaning president of Montenegro, which, besides Serbia, is the only other republic that is still part of Yugoslavia. NPR's Mara Liasson reports.