Hmmm ... I was gonna say the Lincoln portrait could go because he'd be out of place in that room full of Black Congressional leaders!
However ... there is tell that if you were to shake Lincoln's family tree .... some dark-skinned leaves might fall out of it! So maybe not!
I like the picture for the irony of the fact that in Lincoln's day, the Black people in that room would have been serving the dinner rather than eating it themselves! That is the beauty of it, IMO.