The advent of a new media has offset the bias of traditional media sources, and it's beyond obvious that traditional media sources are for the most part biased toward the modern liberal mindset as represented politically by the Democrat Party. Although anyone who sets out to find evidence that bias doesn't exist can find articles in the traditional media which are critical of certain actions of certain Democrats, the overall coverage, and particlarly what's not covered, reveals a bias that is undeniable.
The new media provides diversity, but if the new media is objectively fair to the Right, it's usually relegated to the category of far-right propaganda by liberal Old Media types. Media sources such as the NYT, Washington Post, LA times, ABC, NBC, CBS, and cable news like MSNBC have practically become components of a Modern Liberal State which is now captured by progressive ideas. It's true that any of these news outlets can produce objective pieces criticizing certain aspects of the Modern Liberal State, but when push comes to shove, they are on board with Democrats maintaining political power. We are unlikely to see Republicans receiving objective coverage as elections draw near, or if a major battle is waged over a Modern Liberal piece of legislation such as the healthcare bill.
Recently, what's incredible has been the difference in coverage of the Tea Party protests and the Wisconsin protests. Whereas there was no evidence of violence, and very little evidence of violent rhetoric at Tea Party rallies, you'd never know it by the handwringing in the media worried about right-wing violent rhetoric. That same handwringing has been conspicuously absent during the Wisconsin rallies in which violent rhetoric and actual violence were clearly present. The calls for an end to hateful speech after the Gabby Giffords' tragedy disappeared as many on Left in Wisconsin voiced far more hatred and violent rhetoric than any Tea Party rally.
This difference in coverage is truly incredible, especially for a sane observer expecting at least a little fairness.