In this March 23, 2010 file photo, former New York Mayor Ed Koch speaks during a publicity event in New York. Koch is keeping tabs on the Democratic National Convention while undergoing a battery of hospital tests. A spokesman for the ex-Democratic mayor says Koch might not get out of the hospital Wednesday, as he'd originally hoped. Koch felt weak over the weekend while staying with friends in North Carolina. He was admitted to New York-Presbyterian Hospital on Tuesday, Sept. 4, 2012,  with anemia.