According to this local ABC affiliate link,Obama says Bush needs to admit mistakes in Iraq: "In a prepared text, Obama said Bush should admit that some things should have been done differently and urge Republicans and Democrats to work together to find a responsible way out of Iraq."
As to the first part of Obama's silly statement, I believe the Prez has actually said, "there have been things that we would have done differently, if we'd known more," or words to that effect, on several occasions. And, I believe he has done that latter part -- about finding a responsible way out -- repeatedly. It's a little something his party seems to fervently avoid, even in our own elections, of late. It's called "winning".