Former first lady Michelle Obama unleashed on President Trump in a new memoir, calling his “birther” campaign a deliberate attempt to “stir up the wingnuts and kooks.”

In her new book, “Becoming,” which is due out next week, Obama calls Trump a “misogynist” who used body language to “stalk” Hillary Clinton during a 2016 presidential debate.

She writes that Trump’s behavior on the debate stage — where he oddly wandered behind Clinton as she spoke — was intended to send a message: “I can hurt you and get away with it.”

She also mentioned that she “buzzed with fury” when viewing the infamous “Access Hollywood” tape in which Trump brags about grabbing women’s genitals.

Obama’s much-anticipated book will be coupled with a promotional tour that will visit arenas such as Brooklyn’s Barclays Center.

She also writes about first meeting future President Barack Obama, raising children, and working to empower girls across the globe.