I'm not sure why you come down on Andrew Johnson equally as hard as on Donald Trump. It's true he was a southern slave owner, not freeing his slaves back in Tennessee, even though he was vice president, until half way through the Civil War. But he hardly was unique for the times in that.
He was impeached by the same radical Republican faction that probably would have impeached Lincoln if Lincoln had lived.
Your comment projects modern-day interpretations on the post-Civil War Republican Party. The partisan terms "Republican" and "Democrat" had different platforms back then than they do now, and America's original sin involved both parties. Here is an account of Johnson:
"Johnson implemented his own form of Presidential Reconstruction – a series of proclamations directing the seceded states to hold conventions and elections to reform their civil governments. When Southern states returned many of their old leaders, and passed Black Codes to deprive the freedmen of many civil liberties, Congressional Republicans refused to seat legislators from those states and advanced legislation to overrule the Southern actions. Johnson vetoed their bills, and Congressional Republicans overrode him, setting a pattern for the remainder of his presidency.
Johnson opposed the Fourteenth Amendment, which gave citizenship to former slaves. In 1866, Johnson went on an unprecedented national tour promoting his executive policies, seeking to break Republican opposition."
Johnson opposed the Fourteenth Amendment, which gave citizenship to former slaves. In 1866, Johnson went on an unprecedented national tour promoting his executive policies, seeking to break Republican opposition."
The Republicans went on to try to impeach him under the unrelated Tenure act, because there were no laws back then against treating slaves like dirt. Johnson escaped conviction in the Senate by one vote.
Don't confuse the Deplorable Cult of today with the Republican Party post-Civil War.