There’s a great potential threat in the United States, more dangerous than the Leftist agenda and more powerful than Obamacare, immigrants and ISIS combined. It’s Adolf Hitler or at least the carbon copy of such a dictator. And Ben Carson has been warning about it for years.

On Wednesday at a campaign stop in New Hampshire the neurosurgeon turned conservative hero warned of the potential of a Nazi-esque force coming to power in the United States. And for those who think it could never happen here, he had something he needed to say.

"I beg to differ," Carson said. "If you go back and look at the history of the world, tyranny and despotism and how it starts, it has a lot to do with control of thought and control of speech."

"If people don't speak up for what they believe, then other people will change things without them having a voice. Hitler changed things there and nobody protested. Nobody provided any opposition to him."

He suggested that there is already somebody currently in the United States who is like Adolf Hitler. But is it Obama? No, of course not!

“I’m not going to go into that that. I think that example is pretty clear,” Carson said when asked this question. When pressed, he denied that he was implying Obama was like Hitler. “No. I am saying in a situation where people do not express themselves, bad things can happen.”

This fear is not new for Carson. In fact, he’s been pretty damn scared of Nazis and the potential of their ideology taking hold in his country for years. In nearly all of his several published books, he makes references to Nazi Germany and Hitler.

He often suggests that the overreaching acts of the U.S. government into the private lives of citizens could give way to a mirror image of WWII Germany.

In the 2014 classic One Nation: What We Can All Do To Save America’s Future, he writes: “Throughout history many societies have failed to push back and have allowed an overly aggressive government to expand and dominate their lives. Nazi Germany is a perfect example of such a society. One can only wonder what would’ve happened if people had not tolerated the foolishness of Adolf Hitler’s appeal to the baser instincts of greed and envy and his institution of an official weapons confiscation program.”

And it could happen soon. Dictatorial regimes in the United States are imminent.

“Such domination is considerably more difficult when people have arms and can put up significant resistance,” he writes in 2015’s What I Believe. “This is the reason that brutal dictators like Fidel Castro, Josef Stalin, Mao Zedong, Adolf Hitler and Idi Amin tried to disarm the populace before imposing governmental control. Such domination could occur in America in the not too distant future if we are not vigilant.”

The real problem is socialism, which Carson says involves people giving up their personal liberties. When that happens, the country is just steps away from a Nazi-esque takeover.

“Sure, there are several different brands of socialism—at least as many types as there are would-be people-planners who wish to impose their plans to control the moral and economic lives of other people,” the doctor writes in 2014’s America the Beautiful: Rediscovering What This Nation Great. “But are you willing to surrender your precious liberties to a socialist state which promises ‘security’ for everyone and government-enforced equality? Isn’t this what Hitler and other socialists promised the German people in his Nazi (national socialist) platform—a country in which government guarantees security and ‘equality’ in exchange for giving up individual freedom? Will Americans fall for the same scam?

“Since Americans are by nature individualistic and entrepreneurial, by definition, then, the socialist program is anti-American, to say nothing of totalitarian.

“Socialism is an old dream. Some dreams are nightmares when put into practice.”

This is a nightmare Carson will stop at nothing to prevent. His campaign has not responded to a request for comment about Carson’s concerns about Nazis.

While he’s generally concerned about it, Carson is a forgiving individual, one who is willing to let bygones be bygones.

“Every person makes mistakes, so it should come as no surprise that every nation of the world has made mistakes as well,” Carson writes in America the Beautiful, in which he also questions whether the rise of the Islamic State is similar to that of the Nazis. “Talk with a German national about the hope their country placed in Hitler’s rise to power on the heels of the Great Depression. Or consider our own nation’s internment of Japanese-Americans during World War II, and you’ll agree that the question is not whether a nation makes mistakes; the question is whether a nation learns from its mistakes, builds on that knowledge it gains over time, and grows in wisdom.”

For Carson, this question remains. Has the U.S. learned anything or is another Hitler just waiting around the corner?