This article makes an excellent -- if obvious -- point. Here's a portion:
What if, in 2006, at Yearly Kos, the first annual convention of liberal bloggers and their readers, organizers shelled out $100,000 for former Vice President Al Gore to address attendees? And what if the same organizers booked as an opening-night speaker a fringe, radical-left conspiracy theorist who'd spent the previous year pushing the thoroughly debunked claim that some Bush White administration insiders played a role in, and even planned, the 9-11 attacks. What if the speaker (also proudly anti-Semitic) received a standing ovation from the liberal Yearly Kos crowd?
Given that backdrop, and given the fact that the 9-11 Truther nut had for weeks bragged about his chance to share the stage with Gore, do you think the press would have demanded that Gore justify his association with a hateful conference that embraced a 9-11 Truther? Do you think pundits would have universally mocked and ridiculed Gore's judgment while condemning the Yearly Kos convention as being a hothouse of left-wing hate? Do you think Gore's appearance would have become a thing?
(In case you don't feel like reading the linked article, its point is the ways in which the media failed to cover the recent Tea Party Convention.)