Can we? The main places where I have seen this story is on here and World News Daily, hardly Clinton friendly sources. If Clinton dug him up she will make sure she left no fingerprints, the MSM wouldn't touch it, so that leave conservative media as the ones who expose the story.
The only way this comes out cleanly, IMO, is if Sinclair passes the polygraph, some group quietly seeks out others who have similar experiences with Obama. I believe that no one engages in this sort of behavior once- if he picked up a strange man and had sex and did drugs with him once he probably has done it hundreds of times. Two or three men with the same story and no one can deny the truth, nor will people worry about where it came from.
By no means.... You're forgetting about the "vast right wing conspiracy". You may recall that the Clintons had conniption fits when they realized that the Republicans were bypassing the DNC-controlled "mainstream" newsrooms here in the United States by going around them and using the foreign press to expose Clinton scandals.
I don't know if the rats have caught up completely with regard to the effective use of the foreign press, but I suspect that the Sinclair story will break big there (if indeed he passed his lie detector test) and then make its way here. There was a time you could count on Drudge to break stuff like this but it doesn't look like Drudge has the stones for controversy anymore.
This story is a massive time bomb just waiting to explode.