I think truly unbiased news sources, particularly in our 24/7 news cycle, are too much to ask for. We're all human. Journalists, of all people, should be expected to have opinions on political issues - after all, shouldn't they be the best informed, given the nature of their jobs?
A better solution, to me, than striving for some unattainable ideal, is for EVERYONE to admit their biases, and for major news outlets to strive for "regular" coverage to be as factual as possible - but to give platforms for clearly labeled, well argued and factually supported opinion pieces from across the spectrum. Prominent, ongoing roles for ombudsmen (ombudspeople? bleh!) who review their employers' offerings for signs of bias, and are expected to publish their analyses on a regular basis, would also be good.