Tea Party advocates have a message for liberal loudmouth Keith Olbermann: Put up or shut up.

After Olbermann delivered one of his bombastic attacks on the Tea Party movement, calling it an all -white group that lacks diversity, the Dallas Tea Party posted a YouTube video that challenges the MSNBC news/entertainment host to show up at a rally this weekend and check out the group himself.

"Something tells me you've never been to a tea party," one group activist says to Olbermann in the video. "We think you need to get out of your bubble."