Former Republican Sen. Lincoln Chafee (R.I.) thinks that John McCain was irresponsible with his pick of Alaska Gov. Sarah Palin (R) as his running mate, calling her a "cocky wacko" that is "dangerous for the future."

"She is dangerous for the future of the country having such limited experience and sharing that aggressive, belligerent approach to the world," Chafee, who is co-chairman of "Republicans for Obama" said during an interview.

Chafee said Palin is "not in our long term best interests," adding that "it's a dangerous planet."

During a speech Tuesday to the New America Foundation, Chafee called Palin a "cocky whacko" and attack her foreign policy and defense credentials. (The comment comes a little over 53 minutes into the video linked to.)

The former Rhode Island Republican endorsed Obama in February. Chafee, who is still a registered Republican, lost his reelection bid in 2006 to Democratic Sen. Sheldon Whitehouse.

Here is the video of Chafee's interview with the Washington Note. The former senator's comments on Palin come toward the end.