That's actually a very good and realistic article, cozie, although you're right in that it's not a very encouraging one!!
What got Nixon to resign was when GOP members of the House went to him in a deputation and told him that impeachment was a certainty and that if he didn't want to be impeached, he should resign. He reportedly said "If I've lost the House, I've lost the presidency" or some such. At any rate, he realized that it was either resignation or impeachment and probable removal from office.
I'm beginning to think that Scrotus could care less about impeachment because he knows he will never be removed from office even if he's impeached. He'd try to use it to his advantage with his base in some way. And the only way he'd resign would be if he could be convinced that the Country would fall apart without him, in a "If you won't play my way, I'm going to take my ball and go straight home!!!" gesture. You know, see it as 'punishment' for not 'appreciating how marvelous he is'. But I don't know what it would take to make him to do that!