Wikipedia is also heavily influenced by paid public relations professionals who do not disclose their conflicts of interest. This list together with the sublists linked below provide a wide variety of examples of the resulting bias.
There is a cabal of editors who work together to bias articles and to hide embarrassing facts about left wing political figures, while at the same time smearing conservatives. Scandals involving left-wing personalities are labeled "conspiracy theories" , for example, ''Spygate'' (conspiracy theory by Donald Trump) or or "controversies" such as ''IRS targeting controversy '' or ''Hillary Clinton email controversy''.
Methods biased editors standard tactics include claiming right leaning sources as being unreliable (non-RS). This also applies to centrist sources that are simply being truthful. The best way to observe Wikipedia is by reading an article's Talk page. You can see editor's disparaging sources contrary to the mainstream media talking points. You will also see many derogatory comments about conservative figures, especially Donald Trump and Republican congressmen and senators. Editors who fight for balanced coverage eventually get permanently blocked.