He also said that Obama gets an 'F-minus' for his presidency.
But Ayers had to be prodded to include Obama in his list of presidents who should be tried for "terrorism."
Sitting down for an episode of RealClearPolitics' "Morning Commute," Ayers told host Charlie Stone that, on policy, Obama receives a "failing grade" along with the "F-minuses" he's given previous presidents like George W. Bush and Richard Nixon.
"I don't think he's let anybody down," Ayers added, pointing to how during the 2008 presidential campaign then-Senator Obama consistently declared himself to be a "middle-of-the-road, pragmatic politician." Ayers also described his favorable opinion of Obama's personality and the fact that he is "interested" and spends a lot of time reading.
Stone pointed out that Ayers views presidents like Lyndon B. Johnson, Nixon, and Bush "with disdain" for their "terrorist" actions, and then asked whether Obama is on that same level for his executive use of drone strikes abroad.
"Of course," Ayers replied.
"Do you think Barack Obama should be put on trial for war crimes?" Stone asked.
"Absolutely," the activist answered. "Every president in this century should be on trial for war crimes. Every one of them goes into an office dripping with blood."
It must comfort Ayers in his dotage that even with a rancid worldview, he is still sought out for his opinion. And it's nice to see that the former terrorist can still turn a phrase. "Dripping with blood" describes Ayers and his Weather Underground group to a "T" - but somehow, the irony escapes him.