Nonsense. Orders were found in possession of Lt. Dahlgren on US Cavalry stationary, with supporting evidence given by Dalgren's father, Kilpatrick and other in the Union military. Lincoln ordered the assasination of President Davis et al.
The Dahlgren canard is not worth refuting, 4CJ. Enjoy your time in fantasyland.
And when Patton said that he was going to go to Berlin and personally shoot Hitler (widely reported, undisputed), does that mean that FDR ordered him to do that?