Veteran comic actor Harry Shearer has been panning the airwaves for many years, collecting footage of politicians and pundits in the moments before they go live. In his varied and colorful career, Shearer has never been more poignant and tragically comic than with his latest project, “The Silent Echo Chamber,” an art installation comprised of the collected silent clips now on display at Seattle’s Henry Art Gallery. Bill O’Reilly, John McCain, President Obama, Hillary Clinton and Anderson Cooper (and more) preen, cuss and shift around nervously (as we certainly would) in the negative space between the dressing room and the nation’s living rooms. If you’re in Seattle, check it out — it’s up through January 16. And you can hear a story about the installation on NPR.