The caller, who gave his name as Anthony from San Diego, California, identified himself as a Republican and started out talking about the direction he thinks the new GOP majority in Congress should take.
"I would just like to say, that the Republicans -- and I'm a Republican -- please do not overreach," the caller began. "I know they're going to overreach but I'm telling you, if you advocate for the repeal of Obamacare and you get too extreme, then Hillary Clinton will be elected President in 2016."
"This is about race," he added. "The Republicans hate that nigger Obama."
Host Steve Scully quickly cut off the caller after he dropped the racial slur.
"Okay, I'm gonna stop you there," Scully said. "We're not gonna use that kind of language."
"You can certainly make your point, but you cross the line when you use language like that," he added. "And so to our viewers and listeners, I want to apologize."
C-SPAN callers aren't afraid to voice blunt views on race. On the 50th anniversary of the Civil Rights Act, several individuals called into the program to talk about white oppression.