 At times, the CNN presidential debate sounded like schoolyard insults. 159 presidential scholars voted him the worst president in the history of the United States of America. Former President Trump returning fire with his own assessment of Joe Biden. He's the worst president in the history of our country. He's destroyed our country. Neither man finding much common ground and blaming each other for everything from the border to fractured abortion laws to foreign wars. Andy Field, ABC News, Washington.