While I'm happy about this, he is still pro-abortion.
If he is the Republican Party's nominee in the 2008 election, most pro-lifers probably won't vote for him.
Like it or not, abortion/life issues are the ones that will define us in a historical context: they are the issues whose impact will endure from generation to generation. The impact of the Jewish holocaust are felt even today, and the sore will never completely close. We've killed 7 times as many as Adolph Hitler, and yet have the gall to vilify him. We rightly condemn slavery, but have no leg to stand on because where we condemn practices applied by race we allow (and in some cases celebrate) even worse practices applied by age.
With embryonic stem cell research, human life becomes a trading commodity. Some call this the evolution of the race. I call it reprehensible and damning.