Cater told CNN's Howard Kurtz.
"And they have been successful in projecting him as a person who is not a citizen of America, who is not a Christian, but a Muslim, and is not a Democrat, but he's a socialist, and so forth," he continued.
"And those seeds that are planted every day that they broadcast by the discussion, in the discussion groups, have found a harvest place in the minds of a lot of Americans. So I think they have completely twisted around what he has done, what he has accomplished, and his own personal character to his detriment. It's a small portion of the total news media."