Did you ever consider the possibility that they may simply not think there is a serious issue here?
After all, Hillary never made an issue out of Obama's citizenship in the primaries; McCain never made an issue out of it in the general election; and neither VP Cheney nor any single member of the House or Senate raised a single objection to the certification of the electoral votes. The Supreme Court may think that if no one sees a problem, there isn't a problem.
Let me be clear: I don't know what the Supreme Court is actually thinking. All we know is they have refused each of these cases so far without a single recorded dissent. I am merely suggesting that, before you decide they are in on a fix, you consider a more innocent explanation.
I'll just say that if lifetime-appointed SCOTUS takes their cues on what to do solely based on what Hillary, McCain, etc., makes or doesn't make issues of, then there is a serious problem.
And if they can't see an issue with Obama and him not being a natural born citizen, then there is a serious problem.
I think the most generous reason for the silence is that they were waiting on the 20th amendment, and have decided, since that's come and gone, to let the remaining cases, and any future ones, run through the lower courts first. I sincerely hope they do or say something one way or another.
You: “After all, Hillary never made an issue out of Obama’s citizenship in the primaries; McCain never made an issue out of it in the general election; and neither VP Cheney nor any single member of the House or Senate raised a single objection to the certification of the electoral votes”
BUT look at how hard it is to get actual proof. If Hillary and McCain suspected, but had no proof, they’d be laughed off the stage. Without the proof, they couldn’t dare bring it up.