No...
Rice will only be the Republican Vice-Presidential nominee. It is still unclear who the Republican Nominee will be...
Possibly McCain, but McCain would have serious difficulty uniting the Republican party, and I'm not convinced McCain would pick a female of Rics's stature as a running mate...She would almost certainly upstage him, and McCain seems fragile about those type of things.
Possibly Gullianni-Rice.
But Yes, Hillary Clinton will be the Democratic nominee.
JMHO Of Course.