Why has Liberal Talk Radio failed?
Its simple. Where conservatives welcome conversation and discussion of subjects that effect our lives, the Liberals can't afford it as it would create discord in their varied ranks. Loose lips sink ships in the dark and murky waters of Liberalville.
First off, imagine a speaker beginning their address to a Conservative group that is rallying against abortion with saying "We all know why we are gathered here today." This is a fairly safe statement as likely at the most there may be two differing schools of thought present. The majority would be those who see abortion as kin to murder and a minority finding abortion as harming the future of our culture and humanity overall.
Secondly, imagine that a Liberal speaker saying, We all know why we are gathered here today." Oh boy, they would soon have a fight on their hands as the reasons are many and they are mostly based on radical and extreme positions.
Those positions would begin with those who believe a woman should have an ability to choose to terminate a pregnancy at will. Now, the reason for that may simply include the inconvenience of having a child, or the economic concern, or the mother having to change her lifestyle, or career, or negatively impact their social standing and so on. All "self" motivated decisions.
Next, but not limited to we would find the environmentalists that believe that humans are causing the greatest harm to nature and we are better off with less people. Then we would have the anarchists who see abortion as a way to destroy the USA or the PETA people who see people as causing the greatest harm to animals and then the sadists that enjoy knowing that with using their vote they can cause pain, suffering (the mother included) and the ability to terminate a human life.
Knowing this helps me understand why Air America limits themselves to making sophomoric jokes and working to cause harm to the Conservative efforts, never giving any effort to promote their own cause as that would require a multitude of separate broadcasts to satisfy all their varied and perverted interests and causes.