WASHINGTON — First daughter Jenna Bush isn't as committed to Republican candidate John McCain as her parents are, who are firmly behind the party's expected presidential nominee.

Jenna Bush told CNN's Larry King that she is open to learning about all the candidates — including the Democrats.

AP Photo/Peter Kramer (ENLARGE)

Laura and Jenna Bush 'The Today Show' earlier this week.

• Preview of the Jenna Bush wedding ELECTION 2008 The Road to the White House • Georgia Voter Guide • Guide to 2008 election • Tell us: What do you think of Biden being on Obama ticket? • Photos: Obama, Biden campaign together • Photos: Biden career Latest Headlines: McCain scrappy, Obama calm as race nears end  Jesse Jackson dodges Obama questions  In McCain, Obama, 2 approaches to Wall St.  A debate night of discipline and muted contrasts  Rescue plan seeks $700B to buy bad mortgages  Tennessee legislator's son at center of Palin hacking speculation  Investigator: Palin probe to end before election  • Georgia politics page • Presidential campaign • Conventions coverage

King asked Jenna Bush and her mother, Laura Bush, who appeared with her, whether they had a favorite between Democratic candidates Barack Obama and Hillary Clinton.

"My favorite is the Republican," said Laura Bush.

Her daughter wasn't as sure.

"I don't know," Jenna Bush said. "I mean, who isn't open to learning about the candidates? But, I mean, and I'm sure everybody is like that. But I really — I honestly have been too busy with books to really pay that much attention."

The Bushes appeared on King's talk show to promote their new book, "Read All About It."

Once bitter primary rivals themselves, President Bush supports McCain's bid to succeed him.

Separately, the first lady said she doesn't like the way the Democratic candidates talk about her husband.

"He takes a huge pounding from the other candidates, not all of them, not my candidate, John McCain, but I think that is — that's demoralizing to me," Laura Bush said.