Fifteen calls with a point of view that was not compatible with the host were made to six radio shows — three progressive (Stephanie Miller, Randi Rhodes, Ed Schultz) and three conservative (Sean Hannity, Laura Ingraham, Rush Limbaugh).
Their findings concluded that all the progressive hosts were more willing to take calls from dissenters than were the conservative hosts. Research 2000’s ranking, in order of accessibility: 1): Shultz, 2) Rhodes, 3) Miller, 4) Ingraham, 5) Limbaugh, and 6) Hannity. Here is the report