Commitments? As in, "I swear I won't act in accordance with my long-held beliefs on these issues"?
If you actually believe that any such commitments would be worth more than a warm bucket of spit, then I guess Hitler was right when he said: "What good fortune for leaders, that the people do not think".
Is Rudy opposed to strict constructionist judges? You can be for abortion and opposed to Roe v. Wade as a matter of Constitutional law.