Ralph Nader isn't ruling it out: The Hill's Eric Zimmerman catches a radio interview with Mark Green, in which Nader says he's leaning against running for president but won't rule it out. 

"I want the progressive agenda to be on the ballot. I'd rather have someone else do it like Jim Hightower or Mark Green," Nader said when asked directly whether he'll run. (Green then announced he's not running.)

Nader also had some harsh words for President Obama, calling his brand of politics "mealy mouthed" and saying Obama has no excuse for not passing a strong climate change/energy reform bill.

It's not the first time Nader has criticized Obama: in June 2008, he accused Obama of trying to "talk white" and appeal to "white guilt" in his run for the presidency, remarks he subsequently stood by, more or less.