The media excuse her mendacity because it serves the progressive cause.
Everyone rightly catalogues Donald Trump’s fibs, distortions, and exaggerations: his assertions about his net worth, his charitable contributions, his initial supposed opposition to the Iraq War, or his “flexible” positions on illegal immigration. After all, he is flamboyant, right-wing in his present incarnation, and supposedly bends the truth either out of crass narcissism or for petty profiteering. So the watchdog media and popular culture have no problem with ridiculing Trump as a fabricator.
But not so with Hillary Clinton, whose untruths far overshadow Trump’s in both import and frequency, but are so often contextualized, excused, and forgotten because of who she is and the purpose her outright lying supposedly serves.