The outburst triggered a political firestorm, but Wilson told "FOX News Sunday" that Democrats are just "playing politics" by trying to drag out the issue and force another apology.
"I've apologized one time. The apology was accepted by the president, the vice president. ... I am not apologizing again," he told "FOX News Sunday."
Wilson said he would "never do something like that again," but continued to defend himself.
The South Carolina Republican on Wednesday accused the president of lying for claiming his health care reform plan would not cover illegal immigrants.
"I believe in the truth. What I heard was not true," Wilson explained Sunday. "I believe (Obama) was misstating the facts."
Wilson also said he was proven right. Saying healthcare doesn't provide for illegal immigrants is nuance. There are no verification mechanism in place in healthcare for determining one's legal status. The White House had to admit that this is how illegals get free medical care on the taxpayers dime and is considering new mechanisms to verify legal status in the healthcare system.
One may find that the 50 million illegals are the very thing burdening the system by showing up in emergency rooms to obtain free care - costing thousands of dollars for a sore throat.
Nancy better reign in her colleagues in the House. If games continue with this on the Floor, it's the death knell for desperately needed healthcare reform. Everyone agrees that the costs of healthcare are skyrocketing, insurance companies feel free to drop sick people or refuse to insure them if they have a pre-existing condition. Everyone wants healthcare for self-employed that is reasonable.
We want to know where the money is going to come from. If there's waste in Medicare - show it to us. Give us the tangible and credible evidence of it. We're not going to let the President cut care for our senior citizens or let him put panels of government caseworkers into conversations that belong between the patient, a family and the doctor to make personal decisions about life and care.
Much more importantly, we want the lying to cease and desist.
Tell the American people the truth.