[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/POLITICS/09/11/palin.father/art.chuck.heath.cnn.jpg caption="Chuck Heather, Palin's father, says it hasn't settled in yet that his daughter, Alaska Gov. Sarah Palin, is running for vice president."]
WASILLA, Alaska (CNN) - Gov. Sarah Palin's father never imagined that his "little girl" would run for the vice presidency, but he knows his daughter's determination made her a success when others, including himself, expected her to fail.
"I look back on Sarah's perseverance, and whatever she wanted to do, she put her nose to the grindstone, especially in sports," Chuck Heath told CNN in an extensive interview in his Wasilla, Alaska, home. "If she didn't have a certain ability, she worked and worked and worked until she obtained that ability or skill."
Sen. John McCain, the Republican presidential nominee, surprised the political world when he picked Palin, a first-term governor from Alaska, to be his running mate nearly two weeks ago. The interview with Palin's father will be included in "Sarah Palin Revealed," a documentary that will air on CNN at 9 p.m. ET Saturday and Sunday.
Heath, a retired science teacher and coach who now works with the federal Wildlife Services Program, said his daughter started exhibiting her stubborn streak at an early age.
"Sarah, she was something else," he said. "I wasn't mean to her. I was stern with her, but I could seldom bend her if she made up her mind on something."