WASHINGTON - Most of the Bush clan have already thrown their support behind the presumptive Republican presidential nominee, Sen. John McCain, with one new notable exception — President George W. Bush’s daughter Jenna.

The president rolled out the red carpet at the White House last month to endorse McCain’s candidacy after he clinched the delegates for the Republican nomination. The White House hosted a lunch and Rose Garden photo-op for the Arizona senator.

When interviewed on CNN’s “Larry King Live” Wednesday night to promote a children’s book she wrote with her mother Laura, Jenna left the door open to possibly backing another candidate.

Here’s the transcript:

KING: Do you have a favorite between the two, the two Democrats?

L. BUSH: My favorite is the Republican.

(LAUGHTER)

KING: Yours, too, I would imagine.

J. BUSH: I don’t know.

KING: A-ha.

J. BUSH: But, I mean, you know…

KING: Are you open to…

J. BUSH: Yes, of course. 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.

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- Photo credit: Reuters/Ray Stubblebine (Laura and Jenna Bush wave to people standing in line for signed copies of their new children’s book.)