George McGovern has been hospitalized in Florida for tests, his daughter said yesterday. The former South Dakota senator and one-time presidential candidate was admitted to a St. Augustine hospital so doctors can determine why he occasionally passes out and loses his ability to speak, reports the Sioux Falls Argus Leader. "He's comfortable. The tests are continuing to see if they can determine what's causing this," said daughter Ann McGovern. McGovern, 89, splits his time between Florida and South Dakota. He was treated for exhaustion last October after a lecture tour, and fell and struck his head two months later just as he was about to be interviewed on a C-SPAN program about presidential candidates, notes AP.