Clinton is scheduled to headline a fundraiser for Berkley on Jan. 7 in Las Vegas.
Berkley is trying to unseat Republican Sen. Dean Heller in next year’s U.S. Senate race. The contest is considered one of the most important in the nation because it could determine whether Democrats keep control of the Senate.
Clinton is no stranger to Las Vegas. He campaigned here last year for Democratic gubernatorial candidate Rory Reid, the son of Senate Majority Leader Harry Reid. Reid lost to Republican Gov. Brian Sandoval.
Berkley is known as a fierce fundraiser. She raised $1.2 million in the last fundraising quarter, compared to Heller’s $675,000 campaign haul.