Really? 

That statement blatantly demonstrates that the most powerful man in the world and two-term President of the United States lacks even a grade-school level of knowledge of American history, specifically history as it relates to three of our most famous presidents, and it demonstrates again that we have essentially elected a foreigner who has no understanding of the very country that he reigns supreme over.  Then again, he was educated at an Ivy league school so you can't expect too much. 

What's wrong with his statements? Let's keep it simple--  EVERYTHING is wrong! 

George Washington did not become president until six years after the Revolutionary War ended in 1783.  By 1789 there were no longer any prisoners for him to exchange. 

Abraham Lincoln was assassinated in mid April of 1865. The Civil War ended the following month. He was still dead at that time. No deals were made to exchange prisoners after the war. All prisoners were simply freed. 

FDR died of a stroke before the end of WWII.  Like Lincoln , he stayed dead after the war so he couldn't do what this jerk says he did. You'll recall that Harry S. Truman made the decision to drop two nuclear bombs on Japan, ending World War II.  He made no deals for prisoners. 

None of the Presidents that Obama noted were in office at the ends of those wars, making it impossible for them to make any sort of prisoner swaps, let alone the 5 for 1, plus unspecified cash, for a deserter and traitor by our "57 States" president. 

It should be pointed out that many deserters and traitors were shot or hanged during all three of the aforementioned wars. 

What amazes one even more than the ignorance of the current President is that he has managed to surround himself with a staff that is just as clueless and a voter base who still adores him.