An Arab political source said Friday that special U.S. Mideast envoy George Mitchell has requested to resign due to his frustration with the way the Obama administration has been handling the Israeli-Palestinian conflict, according to a Nazareth-based daily. Hadith a-Nass reported that Mitchell's request stemmed partly from to his own failure to advance the resumption of peace negotiations between Israel and the Palestinians and also from his perception that certain elements within the State Department hold biased favor toward Israel.