EXCLUSIVE: Read it here first...

President Obama: Viva Las Vegas, Baby!

Wed., May. 27, 2009 6:30 PM PDT by Marc Malkin

Courtesy: Caesars Palace ; AP Photo/Pablo Martinez Monsivais

What happens in Vegas stays in Vegas—unless you're the president of the United States.

I just got the scoop on President Obama's overnight in Sin City.

Where did he stay? What did he eat? What celebs was he hanging with? Read on for all the details!

Obama checked into Caesars Palace at about 5 p.m. yesterday. He is said to have ordered a steak from the hotel's Neros restaurant. Then it was off to a fundraiser for U.S. Sen. Harry Reid's re-election campaign and the Nevada Democratic Party.

I'm told Obama met backstage with comedian Rita Rudner and Bette Midler, who had performed during the gala. The Divine Miss M presented the president with two ukuleles for the first daughters, Sasha and Malia.

He spent the night in a 22,000-square-foot suite, which features four bedrooms, six bathrooms, at least two formal living rooms, a dining room and butler's quarters. Oh, and there's a private pool out on the patio!

Obama hit the Qua Baths and Spa 8:30 a.m. this morning for a 45-minute run on a treadmill, according to a source.

"The spa was closed down just for him," the source said.

How long does it take to secure a place like Caesars for the commander-in-chief? About a week. I'm told Secret Service first arrived last Tuesday.

After Vegas, it was off to Hollywood. The president headlines a fundraiser tonight for the Democratic Party at the Beverly Hilton hotel.