A radio ad for a handgun training class that bars Muslims and Obama voters has sparked an investigation in Texas.

"We will attempt to teach you all the necessary information you need to obtain your [Concealed Handgun License]," the ad says. Then towards the end, it adds: "If you are a socialist liberal and/or voted for the current campaigner in chief, please do not take this class. You have already proven that you cannot make a knowledgeable and prudent decision under the law."

And then: "If you are a non-Christian Arab or Muslim, I will not teach you the class with no shame; I am Crockett Keller, thank you, and God bless America."

The ad ran for six days on KHLB, Mason's local station. It's also been heard tens of thousands of times on Youtube.

Keller, 65, has said in media interviews that he just regards the message is just common sense. "The fact is, if you are a devout Muslim, then you cannot be a true American," he told local news station KVUE, while fielding calls congratulating him for his stance. "Why should I arm these people to kill me? That's suicide."

"I call it exercising my right to choose who I instruct in how to use a dangerous weapon," he added.

But the state of Texas may disagree. The Department of Public Safety said in a statement that certified instructors of handgun training are required to comply with all applicable state and federal laws, and added: "Conduct by an instructor that denied service to individuals on the basis of race, ethnicity or religion would place that instructor's certification by the Department at risk of suspension or revocation." The department has said it has begun an investigation.

It seems unlikely that Keller will back down, though. "I'm not going to do it," he told the local news. "I will give up my license to teach before I will teach them," he said, referring to Obama voters and Muslims.

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