confederate states
slaves in the south.
I THINK THE ANSWER IS IN 1863
The first African American to visit the White House was Fredrick Douglas After Pres. Lincoln signed the Emacipation Proclamation.
The Emacipation Proclamation was written by Abraham Lincoln. It stated that there was to be no more slavery in the Union states.
Abraham Lincoln
...keeping the British out of the war. After the issue of the Proclamation, they could not aid the Confederates without looking pro-slavery.
The Emancipation Proclamation was issued in Washington, DC, by President Lincoln, and freed those slaves held in territory then in rebellion against the government of the United States of America. As a result, it did not free anyone until Confederate lands were conquered after the Proclamation was signed. Those slaves held in lands already under the control of Union forces were not affected by the Proclamation.
Because the Union had at last scored a victory (Antietam), so he could issue the Proclamation without making it look like a desperate measure.
With a flourish
Emancipation Proclamation
You mean the emancipation proclamation that Abe signed.
Abraham Lincoln