Sarah Palin coy about 2012 run, but door is open

"My ambition, if you will, my desire is to help our country in whatever role that may be, and I cannot predict what that will be, what doors will be open in the year 2012," she told Barbara Walters.

When asked whether she'd play a major role, the former Republican vice presidential candidate replied that "if people will have me, I will."

Palin is making the rounds to promote her new book, "Going Rogue," which came out Tuesday. On Monday, she appeared on "The Oprah Winfrey Show."

Palin said she's gotten plenty of offers during the past few months, including to open up her family for a reality show, that she has rejected. She also said she wasn't sure whether a talk show would be best for her family.

"I'd probably rather write than talk," she told Walters.

The former Alaska governor said she'd rate President Barack Obama's performance a 4 out of 10. She criticized the president for his handling of the economy and for "dithering" on national security questions.

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