Some of the right-wing media universe's biggest stars are set to descend on the White House Thursday for what has been billed as a "social media summit" and will likely become a forum for airing claims of anti-conservative social media bias. In addition to inviting leaders from traditional conservative think tanks, such as the Heritage Foundation and Claremont Institute, the White House has requested the presence of far-right internet personalities and trolls, some of whom have pushed conspiracy theories, lies and misinformation. It's perhaps the clearest example yet of President Trump legitimizing fringe political allies.