It seems McConnel, NRA, ACLU are going to attack, and with a lot of Constitutional weight and prior precedents, the soft money bans and advertising ban and all other limitations. The only one that seems to be safe is the hard money limit which was raised from $1,000 to $2,000. That is where the GOP whips the Dems every year - in hard money. Bush even mentioned that at the signing (snicker, snicker) ceremony (snicker, snicker I loved the slight at McCain hehehe).
In Buckley (1976) Wasn't that a 9-0 decision? Wasn't Rehquist AND Stevens on that court? If so, seems there is two votes there...if it even gets that far. Bush may decide after lower court rulings not to appeal.