Jenna Bush, the daughter of President George W. Bush, said Thursday that she may not vote for Sen. John McCain for president, even though he is in the same political party as her father.

"I don't know," she told CNN's Larry King when asked if she had a favorite between the Democratic candidates, reports the AP. "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."

Bush, one of the president's twin daughters, appeared with her mother Laura on Larry King Live to promote their new book, "Read All About It." Her twin sister Barbara Pierce Bush, named after George W.'s mother, is the eldest of the twin daughters.

Bush is set to marry fiance' Henry Hager on May 10. The wedding will be held in her father's ranch in Crawford, Texas. It was reported Thursday that Bush and Hager will make their home in Baltimore after the wedding.