Any excuse not to fight.
Exactly. The enemy is doing stuff! Oh Noes, retreat!!
Gen. Meade has been a pretty solid supporter of his boss up to now, but even he is losing patience. The tells his wife today that, while McClellan waits, the rebels fortify Richmond.
https://civilwarnotebook.blogspot.com/2014/01/brigadier-general-george-g-meade-to.html