Joe Biden's Antebellum ancestors owned slaves. A genealogical report released on October 5, 2020, reveals that Biden’s grandmother’s family, the Robinette’s, owned slaves.
https://belleofliberty.wordpress.com/2020/10/13/joseph-robinette-biden-jr-s-antebellum-ancestors-owned-slaves/
The request for Moses Robinette's pardon went through a West Virginia senator (who?), who described Robinette’s punishment as “a hard sentence on the case as stated”. Then it went to Lincoln’s private secretary, who requested a judicial report and the trial transcripts. Three Union army officers (names please) who knew Robinette later petitioned Lincoln to overturn his conviction, writing that the sentence was unduly harsh for “defending himself and cutting with a penknife a teamster much his superior in strength and size, all under the impulse of the excitement of the moment”.
https://web.archive.org/web/20240219212203/https://www.theguardian.com/us-news/2024/feb/19/joe-bidens-great-great-grandfather-was-pardoned-by-abraham-lincoln
Senator Waitman T. Willey, a former Whig who became one of West Virginia’s first senators after the state’s admission to the Union, passed on the pardon request after officials vouched for Robinette’s character.
https://ustimespost.com/joe-bidens-great-great-grandfather-moses-robinette-was-pardoned-by-abraham-lincoln-after-stabbing-a-man-was-convicted-of-attempted-murder-and-imprisoned-on-a-remote-island-off-florida-in-1864-docum/
Waitman T. Willey (October 18, 1811 – May 2, 1900) was an American lawyer and politician from Morgantown, West Virginia. One of the founders of the state of West Virginia during the American Civil War, he served in the United States Senate representing first the Restored Government of Virginia and became one of the new state of West Virginia's first two senators.[1] He is one of only two people in U.S. History to represent more than one state in the U.S. Senate, the other being James Shields (who represented Illinois, Minnesota, and Missouri).
In 1859 Willey became the Whig delegate for Lieutenant Governor of Virginia, but lost. The following year he campaigned for Everett and Bell of the Constitutional Union Party (The Constitutional Union Party was a United States third party active during the 1860 elections. It consisted of conservative former Whigs, largely from the Southern United States, who wanted to avoid secession over the slavery issue and refused to join either the Republican Party or the Democratic Party.) in the 1860 Presidential election. His candidates lost badly, and Republican Abraham Lincoln was elected president.
Elected a member of the Virginia Secession Convention in 1861 (representing Monongalia County, alongside J.M. Heck and Marshall M. Dent), Willey warned fellow delegates about the ravages of civil war.[8] Although Willey voted against secession several times during the convention, the ordinance of secession eventually passed and Virginia seceded on April 17, 1861.[9] Although conservative (and a slaveowner), Willey actively participated at the First Wheeling Convention of May, 1861, which ultimately led to West Virginia statehood (although Willey had been among those who blocked John S. Carlile's proposal for immediate statehood).
https://en.wikipedia.org/wiki/Waitman_T._Willey
tl;dr: Joe Biden's great-great grandfather from Virginia where loyalties were mixed leading up to the Civil War was or wasn't a slave owner and a slave-owning senator who worked to elect Confederates for President got President Lincoln to pardon him after trying to murder a civilian military employee.
Joe Biden's great-great grandfather Moses Robinette's political ally Waitman T. Willey who helped secure his pardon for attempted murder campaigned for Edward Everett and John Bell of the Constitutional Union Party in the 1860 Presidential election. Dig!
Constitutional Union Party (United States)
https://en.wikipedia.org/wiki/Constitutional_Union_Party_(United_States)
John Bell (Tennessee politician)
https://en.wikipedia.org/wiki/John_Bell_(Tennessee_politician)
Edward Everett
https://en.wikipedia.org/wiki/Edward_Everett