That's because Lincoln was. Republican. The party didn't begin until 8 years or thereabouts before he was elected president.
And just like today, some Southern Republicans loved black people so much they thought that they should use some of the debt payments for WWI to ship all black people back to Africa. MAGA
The only change NotMAGA will perform is transitioning from a man to a woman and woman to a man. He/she/it/they are full service transitioning whack jobs.