The son of a US politician has dismissed a claim by former US President Jimmy Carter that an outburst during a speech by Barack Obama was "based on racism".
Mr Carter said yesterday Congressman Joe Wilson's outburst was also rooted in fears of a black president.
"I think it's based on racism," Mr Carter said.
"There is an inherent feeling among many in this country that an African-American should not be president."
But Mr Wilson's son disputed that.
"There is not a racist bone in my dad's body," said Alan Wilson, an Iraq veteran who is running for state attorney general in South Carolina.
"He doesn't even laugh at distasteful jokes."
Mr Carter, a Democrat, said Joe Wilson's outburst was a part of a disturbing trend.