Medea Benjamin, a Green Party activist, and the party’s U.S. Senate nominee in California in 2000, is the subject of many news stories on May 23. She was in the audience at President Obama’s speech to the National Defense University, and she interrupted the President with questions about why he doesn’t close Guantanamo Prison and related matters. See this story, one of many. Also this story talks about how she gained admittance to the room. Here is a you tube of what Benjamin said.
In 2000 she polled 326,828 votes for U.S. Senate in California, 3.08%, placing third in a race with seven candidates on the ballot.