President Donald Trump told Fox News that Iran has become "much more aggressive" in nuclear talks."Iran is acting much differently in negotiations than it did just days ago," Trump told Fox News' Bret Baier. "Much more aggressive. Its surprising to me. Its disappointing, but we are set to meet again tomorrow well see."Senior administration officials also told Fox News that Iran appears to be dragging negotiations on without concrete progress while pushing forward with its nuclear efforts.This is a developing story. Check back for updates.