Yet another behind-the-scenes change at Anderson Cooper’s syndicated daytime talk show is the departure of Ashley Bush, Page Six has learned. Bush — captivating sister of Lauren Bush Lauren and niece of George W. Bush — was assistant to “Anderson” executive producer Lisa Morin, who resigned last week. Morin came to Cooper’s show from Oprah Winfrey’s Harpo Productions. Sources close to Cooper say it was Bush’s first job out of college, and she resigned well before Morin. Either way, the show has lost a well-connected staffer. Morin is one of the exec producers who exited Cooper’s show before its second season.