Whenever a writer for one of America's most influential newspapers states his or her opinions about liberal media bias, it should be brought to the attention of NewsBusters readers (unless, of course, said writer merely offers some variant of the lame, threadbare "we get complaints from both the right and the left, which tells me our coverage is balanced" argument). Washington Post humor columnist Gene Weingarten also occasionally writes long pieces for the paper's Sunday magazine. In a Monday web chat concerning Weingarten's admiring profile of Doonesbury's Garry Trudeau, a questioner charged that the Post ran that story and others...