Why in the hell doesn't he have to? Failing on this issue will cost the Republican party millions of votes by demoralizing the base, it will destroy any integrity that he has and result in a legacy of failure bigger than his father has.
And, what does it say about conservatives if they keep letting the Republicans break their promises to fix the judiciary, dramatically increase government spending and do nothing about the illegal immigration problem? It's no wonder major change never occurs when far too many are too stupid to hold the Republicans accountable for their broken promises.
But, this would be a broken promise that people will remember for 20 to 30 years. There is no excuse for Bush breaking his promise on this and millions will not be forgetting or voting Republican if that happens.
Guess we will find out tonight at 8.