Donald Trump is launching an extraordinary attack on Dick Cheney, blasting the former vice president for revealing White House secrets in his new tell-all memoir, In My Life: A Personal and Political Memoir.

"I didn't like Cheney when he was the vice president and I don't like him now!" Trump said. "Here's a guy who did a rotten job as a vice president; nobody liked him, tremendous divisiveness, and he's going to make a lot of money on the book."

Trump posted his rant on YouTube, calling Cheney a liar and a rat. Cheney has said his book would cause heads to explode, and he wasn't kidding.

"I don't like people that rat out everybody like he's doing in the book. I'm sure it'll be a bestseller, but isn't it a shame?" Trump said.