Laura Bush says she admires the "grit and strength" the New York senator demonstrated in her hard-fought but losing battle with Barack Obama for the Democratic presidential nomination.
However, the wife of U.S. President George W. Bush added that if a woman is to be elected president, she'd prefer a Republican.
She also defended the comments of Obama's wife, Michelle, who has been criticized for saying that for the first time in her adult life she's proud of the United States.
Laura Bush said she thinks her possible successor probably meant that she's "more proud" than she was before, adding: "You have to be very careful in what you say."