File - In this March 8, 2014 file photo, former Alaska Gov. and 2008 Republican vice presidential nominee Sarah Palin gestures to the crowd as she walks off-stage after addressing the Conservative Political Action Committee annual conference in National Harbor, Md. Palin defended as fair and commonsense the oil tax structure she championed while in office, a system that has been dismantled by state lawmakers and her successor, fellow Republican Sean Parnell. Palin also took a swipe at Parnell on Anchorage radio station KWHL Wednesday, May 7, 2014, when asked about Parnell's change in direction. (AP Photo/Cliff Owen, File)
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