President Trump’s pick to head up science at the Department of Agriculture was a “birther” who once charged that then-President Obama hoped to take over the country and be a “dictator” who would “enslave” the American people, a new report said Thursday.

“This president is a dangerous person,” Sam Clovis wrote in a 2012 blog post, CNN reported.

“He is dangerous in that he does not have the interests of the nation in mind and is more than willing to do anything to advance an ideology that is absolutely opposed to American exceptionalism. He wants to be a dictator and he wants to enslave all who are not part of his regime.”

Clovis, 67, is an Air Force vet and former conservative radio talk show host who served during the campaign as Trump’s chief policy adviser and national chair.

His nomination to be under secretary of agriculture for research, education, and economics at the USDA generated howls from Democrats and others because Clovis has no scientific background.

In addition to his longtime questioning of whether Obama was born in the US, Clovis is also a climate change skeptic, the network said.

“I’m so skeptical on all of this because the science is — people — a lot of people out there including our friend, know your buddy, Al Gore keeps saying this is settled science. I’m not sure this is settled science,” he said in a June 2013 appearance on WHO Radio.