Graham has found himself at the center of a heated debate regarding the replacement of Supreme Court Justice Ruth Bader Ginsburg.
On the same day, the Wisconsin Supreme Court blocked Gov. Tony Evers' executive order which moved to delay the state's primary until June.
During Tuesday night's debate in South Carolina, the former vice-president vowed to ensure representation in the nation's highest court.
SCOTUS Strikes Down Murder Conviction Of Mississippi Black Man, Finding Racial Bias In Jury Selection
Curtis Flowers has spent 22 years on death row in Mississippi. His case has been returned to state court.