His father may have a different career. The Keating Five may be only four. Campaign Finance Reform will have another champion. George W. Bush may lose to someone else in 2000. Sarah Palin may be impeached or be viewed very unfavorably.
I am thinking that Romney is the 2008. He might have named Palin. He too would have to build support among social conservatives. He also would want to attract women disappointed that Hillary did not get the nomination.