Last week's revealing phone call between a Buffalo Beast prankster and Wisconsin governor Scott Walker clarified the extent to which billionaire rainmaker David H. Koch manipulates public officials.

But Koch doesn't just play puppeteer with politicians. He also has his hooks into public radio and television: although it has not been widely reported, Koch is a trustee at the Boston-based WGBH, PBS's largest producer of web and television content.

As the historic protests in Wisconsin compete with the historic popular uprisings in the Middle East, Massachusetts labor organizers are rallying in solidarity with WI state employees on Tuesday at 4 pm at the Golden Dome. The participants include the Mass Teachers Association, Mass AFL-CIO, AFSCME Council 93, a couple of SEIU locals, and many more.