Joe Biden's great-great-great-grandfather owned two slaves in Maryland and another enslaved a 14-year-old boy, new book reveals

President Joe Biden has often shown pride in his Irish Catholic roots, but on another side of his ancestry, the progressive commander-in-chief's family lineage can be traced back to America's shameful past of slave ownership.

Jesse Robinett, Biden's great-great-great grandfather, owned two enslaved people in Maryland in the 1800s, according to a Politico story adapted from a bombshell new book, The Bidens. 

Biden shares an apparent connection with Robinett through his full name - Joseph Robinette Biden Jr.   

Another ancestor of Biden's also reportedly owned a slave in Maryland - a 14-year-old boy. That 3x-great grandfather is Thomas Randle, who held the child in 1850 in Baltimore County, according to census records and slave schedules at the time.