Senator Richard Mentor Johnson: He did not attempt to hide his relationship with a slave named Julia Chinn, which caused his own party to distance themselves from him and contributed to his failed Senate re-election bid in 1828.
 
 Richard had lived openly with one of his slaves, a "mulatto girl" named Julia Chinn. Julia had been raised by Richard's  mother  and he inherited her from his father. (Calling Dr. Freud.)  But Richard trusted her completely. She ran his plantation, Blue Spring Farm, while he was away in Washington. And after she died of cholera in 1833, his business affairs simply fell apart.  
 
he continued to treat his "mulatto" child, Imogene Johnson, with affection and respect in public. Worse, he had taken another "Negro" mistress. But when this second slave concubine ran off - with an Indian it was claimed, - Johnson had her tracked down and dragged back in chains. He then sold her at auction, and took her teenage sister as his next mistress.
 
This was the woman he insisted upon taking to Washington parties and dances, and introducing to his hosts and hostesses, thus placing them in awkward social situations. One friend wondered how he expected his friends to tolerate the situation, "...when he lives in adultery with a buxom young Negro wench?"

In 1840 this, and a recession, proved too much. Despite Johnson's vibrant campaigning, even displaying his battle scars in public, Van Buren was defeated. Johnson returned home to Kentucky to continue his scandalous life. When Imogene reached maturity he gave her land for her dowry, and she married a white man.  He suffered in pain from his battle wounds until his last day on earth. November 19, 1850, less than a week after he was elected to the Kentucky legislature once again by his constituents, who always supported him - whatever the color of his mistresses.