Republican presidential candidate John McCain met Sunday with Iraq's foreign minister, Hoshyar Zebari. The two discussed security improvements in Iraq, and spoke about negotiations between the two countries on an agreement to pave the way for the future presence of US military forces in Iraq. Many Iraqis object to the idea of an indefinite US presence in their country. "It's very important that we not let any of this success slip away," McCain said after the meeting at his campaign office near Washington. Iraqi officials have raised a number of objections to the proposed agreement. Zebari acknowledged there were "difficulties in negotiations." But during an interview later on CNN's "Late Edition," he predicted an agreement would be reached by the end of July.