President Donald Trump raged on social media after Germany's chancellor, Friedrich Merz, sharply criticized the United States' handling of negotiations with Iran, warning that Washington is being "humiliated." 'An entire nation is being humiliated' Friedrich Merz claims Iran is outmaneuvering the U.S. by avoiding meaningful negotiations. By: MEGA A day before Merz's remarks, Trump told Fox News, "We have all the cards." He added that if Iran wants to negotiate, "they can come to us, or they can call us." Speaking to students in Marsberg, Merz suggested the opposite dynamic is at play.