King Abdullah leaves Riyadh hospital after back surgery . President Obama says the United States has lost a ' valued ally ' who had been ill for some time and is in a New York hospital . CNN 's Jamie Crawford , Mohammed Jamjoom , Moni Basu , Nic Robertson and Rima Maktabi contributed to this report . Prince Nayef , a reputed conservative , is a likely successor .
King Abdullah leaves Riyadh hospital after back surgery . President Obama says the United States has lost a ' valued ally ' who had been ill for some time and is in a New York hospital . Prince Nayef , a reputed conservative , is a likely successor .