Brian Steinberg Senior TV EditorThe most compelling element of Jonathan Capehart’s next MSNBC special may not be the host, but rather a video tableau of White House officials who have publicly identified as being LGBTQ.“You really see all of these people and just think about how far the community has come, and how far the nation has come,” says the host of MSNBC’s “Sunday Show,” in an interview. “I had to take a step back and realize that this is not usual.”Capehart typically holds forth on Sunday mornings for the NBCUniversal-owned cable-news outlet, but he will appear on its screen this Sunday evening at 10 p.m.