Newspaper as political party

With the alleged decline of political parties on the Continent, have some newspapers and/or news websites become a conduit for political protagonism? If so, where’s the dividing line between news and propaganda? Does a newspaper’s unambiguous and/or unyielding political stance put its credibility at risk? Or rather, does such a stance actually enhance its credibility? Aloof fence-sitting hardly fits comfortably with the prevailing zeitgeist.