Dinesh D’Souza’s new book, “The Big Lie: Exposing the Nazi Roots of the American Left,” turns the left’s attack on President Trump and conservatives on its head. The actual “fascist” threat, he writes, is borne out of the Democratic Party.

D’Souza spoke with Townhall Monday about the plot he says is taking place in American politics.

“The left perfunctorily called Reagan a fascist, they called Bush a fascist, but with Trump they mean it," he said. "And so their argument is that they’re fighting, you know, they’re fighting the equivalent of Hitler in the 1930s. And therefore, they’re justified in using all possible measures including force, including a kind of disguised coup to get rid of this guy because he could metamorphose into the kind of maniacal despot Hitler eventually became.”

In doing so, D'Souza writes, the left becomes the "fascist" movement they so loudly condemn.

For instance, the "resistance" protests against Trump - some of which have been vulgar, violent and destructive - are still going strong six months out from Inauguration Day. D’Souza doesn’t see an end in sight.

“I don’t think it is going to end for the simple reason that early on, not just the far left, but the mainstream of the Democratic Party embraced the idea that Trump is fundamentally illegitimate. That it didn’t matter if Trump won a lawful election, that he is outside the bounds of an acceptable U.S. president. And I think this is where the fascist card is important. The allegations that Trump is a fascist are crucial here.”

He put it another way. The "fascist card," he said, "is not a mere insult." Rather, it is "a justification for all this extremist behavior on the left that would otherwise be very difficult to condone."

Seeing the "fascist card" become more prevalent, the author considered it was time to write a book about it.

D’Souza recently brought signed copies of "The Big Lie" to the White House as a means of encouraging the president and his staff to not let the left’s assaults get to them.

“The Republicans are often accused of things, and yet Republicans don’t fight back," D'Souza noted. "Trump is a fighter. And I wanted Trump to see that these charges of fascism, not only can they be repelled, but they can be flipped onto the other side. The left is actually the true party of fascism, and neonazism. So I wanted Trump to see this, to see what I’ve come up with. When you’re in the White House, you’re caught up in the whirlwind of daily events. It’s very difficult to step back, and get a sense of perspective - let alone historical perspective."

D'Souza has some experience with the White House, having worked under President Reagan. He was delighted to give Trump's staff the "bird's eye view of the ideological landscape."

Each of D'Souza's projects seem to be more controversial than the last. For instance, "2016: Obama's America," and "Hillary's America" were two feature films that didn't exactly receive glowing coverage from the mainstream media. I had to know, why is D’Souza not scared of controversy?

“Well, I think it’s because at the end of the day, I just haven’t forgot that 17-year-old that I was, coming to America, as an exchange student, with $500 in my pocket," he explained. "And you know looking for this kind of elusive idea of the American dream. And I feel like I’ve lived in America and I’ve seen that realized in my own life, politics is based on that. I see that that American dream is imperiled. And I see that it’s gonna require knowledge and courage and action to sustain it. And I can’t very well, you know ask other people if I don’t do it myself. In some ways, I think my status as an immigrant allows me to see America from the inside and the outside both and I think that dual perspective has helped both my writing and my movies.”

You can grab your copy of "The Big Lie: Exposing the Nazi Roots of the American Left," published by Regnery Publishing, here.