I guess there was no such thing as the US Mail in 1861. Or telegraphs for that matter. Once Congressmen left Washington City they were in a limbo where no mortal could reach them.
Certainly not the President of the United States, who had no options available to him. Poor Abe.
My guess is that your post was some sort of lame attempt at snark.
Lincoln had options but it was the slavers who dealt the cards. They dealt poorly and left the table empty-handed.
Poor stupid slavers.