NEW YORK (Reuters) - The United States is trying to promote a humanitarian crisis in Venezuela by imposing new sanctions, Foreign Affairs Minister Jorge Arreaza said on Friday after the sanctions were announced by the White House. Speaking at the U.N. headquarters in New York, Arreaza said “threats” and “supposed sanctions” from the United States are “uncivilized politics.” He said Venezuelan President Nicolas Maduro will not attend the annual gathering of world leaders at the U.N., scheduled for next month. 