I never understood why liberals thought they could emulate the conservative propaganda methods with any success.
This is true. Conservative propaganda consists of reporting the news, something that the leftist media doesn't do. OTOH, they had to do something, since liberal propaganda is increasingly getting tuned out. CNN and MSNBC are tanking, the major left-wing newspapers are hemorraging readers, advertisers and revenues, and NPR wouldn't exist without massive infusions of taxpayer cash.