Rice says Obama's campaign success shows US has come a long way in race relations

Condoleezza Rice says it is a remarkable accomplishment that a black politician is on track for his party's presidential nomination.

The secretary of state says it's great for the country that Barack Obama is the expected Democratic nominee. Rice says it shows that the U.S. has come a long way. Rice herself is the second black to be America's top diplomat. Colin Powell was the first.

Rice also is making clear that she doesn't want to be considered for vice president. She wants to return to California and write a book about America's foreign policy when President George W. Bush leaves office in January.

Rice also says, in a television interview that aired Sunday, that she has decided which candidate she will vote for in November. She just isn't saying in public who it will be.