President OBAMA’s shadowy past could doom his future, The ENQUIRER has learned.

A blockbuster new book rips the lid off President Barack Obama’s darkest se­crets – and could doom his bid to win a second term in the White House!

The explosive tell-all by take-no-prisoners blogger Mondo Frazier reveals the command­er in chief is a “chain-smok­ing wreck” who could be hooked on prescrip­tion drugs, and claims he may have spied for the CIA in col­lege.

“I’ve uncovered that Presi­dent Obama has spent over $2 million in legal fees to keep the details of his past hidden,” Frazier told The ENQUIRER. “This new book will surely impact his re-election campaign.”

In “The Secret Life of Barack Hussein Obama,” published by Simon & Schuster’s Threshold Editions press, Frazier alleges President Obama could have been a “CIA double agent” when he was a student at Columbia University.

That may be the reason why Obama re­fuses to release his Columbia records, ac­cording to Frazier, who also discloses that former National Se­curity Agency employee Wayne Madsen has discov­ered CIA files directly linked to this secret.

In another bombshell, Frazier claims a clandestine effort is already underway to prevent Obama’s re-elec­tion, with “a team of ex-CIA officers…traveling the globe assembling a dossier of documents on Obama’s past, in­cluding his education, passport, travel and resi­dency records.”

Meanwhile, with the economy in shambles, Obama has turned into “a nervous, chain-smoking wreck,” and it’s even feared that he’s hooked on “prescription anxiety medication,” according to Frazier. The book also claims the stressed-out president has been “yelling” at staffers and throw­ing “temper tantrums.”

Painting Obama as paranoid, Frazier writes the chief executive maintains a secret “enemies list” that includes conservative commentators Rush Limbaugh and Glenn Beck.

Frazier also claims Democratic Party insiders secretly “don’t think” Obama “is up to the job of president and don’t want him to run again in 2012.”