Texas congressman and Republican presidential candidate Ron Paul ended an interview with CNN after he was questioned about a hate-filled newsletter that was published under his name.

The newsletters were published about 20 years ago and contained a number of incendiary comments about African-Americans, such as referring to Martin Luther King Jr. Day as "Hate Whitey Day." All of the newsletters featured his name, but Paul has said he did not write the racist language.

"So you read them, but you didn't do anything about it at the time?" CNN reporter Gloria Borger asked him on Wednesday.

"I never read that stuff," Paul responded. "I became aware of it probably ten years after it was written, and it has been going on for twenty years that people have been pestering me about this, and CNN does it every single time. So when are you going to wear yourself out?"

"I didn't write them, I didn't read them at the time, and I disavow them," he added, when pressed about the issue.

After Borger continued to question Paul about the newsletters, he started taking off his microphone and ended the interview.

Paul told CNN on Tuesday that the racist newsletters had resurfaced because his policies were winning, and it was the only way his opponents could discredit him.

Watch video, courtesy of CNN, below: