So Colbert encouraged voters to select Cain as a stand-in.
The pair appeared together on Friday, one day before South Carolina’s primary, at a rally at the College of Charleston.
“Herman is the only former candidate who truly shares my values. It’s like our values were separated at birth. And our ethics are at least first cousins,” Colbert told the crowd.
College officials say more than 5,000 people attended the event.