By Sam Bush

Chris Christie has morphed from a politician into the Wizard of Oz.

Christie predicted yesterday that if the U.S. Supreme Court rules in favor of his quest to repeal laws banning sports betting,Monmouth Park Racetrack “would be open inside a week” for bettors.

Fat chance, pardon the expression!

He also blasted the federal government’s double standard on marijuana while appearing as a guest host on New York WFAN’s “Boomer and Carton” and said the federal government has been inconsistent in its application of legal standards.

“They pick and choose,” the outgoing New Jersey governor said. “For instance, the Obama Administration said it was OK to legalize recreational marijuana even though marijuana is still illegal on federal level, but the Obama administration said ‘No’ on gambling.”

Sports betting has been illegal since a 1992 federal law banned it all but four states, Delaware, Montana, Nevada and Oregon.

The U.S. Supreme Court is currently weighing whether to grant New Jersey’s attorney general the chance to make oral arguments in favor of legalizing sports betting here.