I don't know how you would ever get 'proof' other than editorials, opinions, etc. The general consensus (even among Democrats) is that all newspapers in the U.S. lean to the liberal as well as the other forms of media. The first link is an actual survey that you should find interesting. It reflects the public's opinion on the media:
>>So, how about YOU prove that the reporting and editorializing of the major US media is more conservative than liberal? > >John started this entire sub thread stating that there is a liberal bias in the media. I'm just asking for him or anyone to prove this statement.
.·*´¨) .·`TCH (..·*
010000110101001101101000011000010111001001110000010011110111001001000010011101010111001101110100 "When the debate is lost, slander becomes the tool of the loser." - Socrates Vita contingit, Vive cum eo. (Life Happens, Live With it.) "Life is not measured by the number of breaths we take, but by the moments that take our breath away." -- author unknown "De omnibus dubitandum"