I'm not so sure. Although you make an excellent point and draw a quite logical conclusion, McCain has one little-bitty problem:
There's no "there" there.
It's already well-known that there was no quid pro quo here; the White House didn't jump to Enron's salvation even after repeated (around 8 or so) phone calls from Mr. Lay. They refused to dance.
No, McCain will (once again) fall flat on his face if he tries to make hay out of this one..................
The best campaign finance reform is honest politicians, which the administration appears to be. Enron got much more out of the Clinton, for a lot less dough, than Enron got out of Bush. However, I really doubt any one will report it this way. So, I think McCain gets back in the spotlight and starts pushing again. Of course, W has always backed banning corporations from donations and I do too. It's the ban on individuals and the ban on advocacy ads that I don't like.