I think it would be congress
Answer:
The action of confederate general stonewall Jackson a bull run lead to general George B McClellan taking charge of the united union army is discussed below in details.
Explanation:
Five days after the battle of Bull Run, George B McClellan was installed in command of the Union Army. He renamed the Army by the Army of the Potomac. he organized it, trained it but refused to lead into a battle because he was asking for more troops for the battle.
George B McClellan was an extraordinary drillmaster and organizer of companies but also a perfectionist who continuously thinks that he was less in numbers, never take chances, and hold the soldiers without pushing for months before ultimately ordered by Lincoln to advance.
Four sitting presidents have been killed, all of them by gunshot: Abraham Lincoln (the 16th President), James A. Garfield (the 20th President), William McKinley (the 25th President) and John F. Kennedy (the 35th President).
Race is the answer to your question