Anchor Margaret Brennan hosts InBusiness With Margaret Brennan on Bloomberg TV. The network has scooped up journalists from rivals in its quest to break news and expand. Courtesy of Bloomberg TV hide caption

itoggle caption Courtesy of Bloomberg TV

Fox News Chairman and CEO Roger Ailes. Frederick M. Brown/Getty Images hide caption

itoggle caption Frederick M. Brown/Getty Images

This week, in the run-up to Saturday's rally, The Daily Show with Jon Stewart has been taping its shows in Washington. President Obama was among the guests. Pool/Getty Images hide caption

itoggle caption Pool/Getty Images

Juan Williams will have a guest slot as host of The O'Reilly Factor on Friday night. FoxNews.com hide caption

itoggle caption FoxNews.com