Myth? More like near-mythical. Her real story is that amazing. This is from Jim Funkhouser, writing at the Tea Party Tribune blog:
"...a political analyst by the name of Richard Halpern was the person who talked Palin into running against a fellow Republican in a primary for Governor.
Now, in hindsight its easy to forget just how hard such an endeavor might be. Think for a moment about a sitting Republican Governor in your State. Lets pick one just for fun, say, the Governor from Texas, Rick Perry. Imagine that in a hypothetical future campaign for reelection that someone from his own party decided to challenge him. Not a well-known figure mind you, but someone who as of this time has only a 10% name recognition; someone that no one even knows even in Texas.
It gets worse. Imagine that the entire Republican Party in Texas is against such a challenge, and they are so against it that some officials actually call our unknown figure and threaten her. And add to this that the challenger has just resigned from the Texas oil and gas commission because she is claiming it is a corrupt political rubber stamp for special interests.
Right now you have to admit that our champion has as close to zero a chance of success as is possible without actually being zero, but were not done. She has no money, no political dynasty family name, she has a large family, and she is a she.
(snip)
Can Palin beat Obama? Compared to what she has accomplished already it will be the easiest campaign she has ever had. It serves every pundit well to remember that the last time that Sarah Palin stepped forward to slay a Goliath she first resigned from a corrupt political entity, and this is exactly what her enemies brought to the office of governor in Alaska after the 2008 campaign.
After leaving the oil and gas committee she emerged triumphant and slayed Murkowski, dont doubt for one second that she cant resign as Governor and parlay that into a winning campaign in 2012."