text:  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. Many describing President Biden's performance last night as shaky. ABC political director Rick Klein. Are there people that start to raise serious alarms in public settings?