That's the fundamental difference. With Nixon, the MSM hated him and only needed an incident to focus on, and they went into 24/7 attack mode.
With Obama, the MSM is engaged in active protection mode. They will not cover Bengazi in any way which would bring down Obama. Also, Obama will not resign in order to protect his party, and the Dems will not go for impeachment, regardless of charges or evidence.
My heart tells me what you said should be wrong, but I fear you've nailed it. I still think it would be cowardice not to continue to try to expose this bunch. We have to go for it in spite of the reality you just described.