Gov Palin did not leave the faith, she is a Born Again Christian, she has left nothing.
She was baptised as a Catholic, and later hoodwinked by an Elmer Gantry type into believing she had to be “born again”.
Hopefully one day she’ll go back to confession and start attending Mass again. She is a lapsed Catholic. She’s a smart woman so there’s a great possibility she’ll return to the fullness of the Christian faith.