Not only is SARAH PALIN’s marriage over BUT so is her political career, The ENQUIRER reports exclusively from Anchorage, Alaska!

Bitterly stung by Joe McGinniss’ book, “The Rogue: Searching for the Real Sarah Palin,” Todd Palin plans to file for divorce AND Sarah’s been advised to forget a White House run, sources say.

“Sarah Palin has been destroyed by Joe McGinniss’ no-holds-barred biography,” a close source told The ENQUIRER. “It’s exposed all her lies, cover-ups and secrets.

“As a result, she’s been told by her ad­visers that it would be political suicide to announce a White House candidacy. The press and her op­ponents would have a field day digging into the dirty details of her background.”

The book has also put the final nail in the coffin of her marriage, added the insider.

Todd was “completely embarrassed” by the book’s disclosure that Sarah hooked up with NBA great Glen Rice in 1987, said another source.

“The hookup has become a crude joke on late-night TV,” said the source. “Todd’s been made a laughing­ stock.”

Todd was “fur­ther humiliated” by con­firmation of a blockbuster ENQUIRER world ex­clusive –  published in October 2008 – that Sarah carried on an extramarital affair with his business partner BRAD HANSON, and Todd dissolved their snowmo­bile dealership after learning about it.

Both Sarah and Hanson denied the affair, but Sarah’s ex-brother-in-law MIKE WOOTEN confirmed the cheating story.

Wooten was the key figure in the “Troopergate” scandal in 2008 in which then-Gov. Palin was denounced for  “abuse of power” by Alaskan lawmakers for her personal vendetta against Wooten.

“Todd and Sarah were headed for divorce, but Sarah got pregnant soon after, so they decided to stay together,” Wooten told The ENQUIRER.

For the FULL STORY with an exclusive interview with the victim of Todd’s “racist bully” beating it’s ONLY in the new ENQUIRER- now on sale!