John Emerson

President, Capital Group Private Client Services; former chairman, Los Angeles Music Center

Emerson was a supporter of Hillary Clinton throughout the 2008 primary, but didn’t hesitate to work for Barack Obama when he secured the nomination. He was co-chairman of Obama’s Southern California finance committee in 2012, and has long known Obama. He and his wife Kimberly hosted him for a book party at their home in 2007, as he was deciding whether to run. He served as deputy assistant to President Clinton from 1993 to 1997, and serves on Obama’s advisory committee for trade policy and negotiations.

Speculation: Germany

Ken Solomon

CEO, the Tennis Channel

Solomon also was an early supporter of Obama, and along with Emerson served as Southern California finance chair during the 2008 cycle. His job takes him around the world where the channel has rights to major tennis events, and he has a long career in cable, new media and TV production, including a stint as president of Universal Studios Television. He serves on the President’s Committee on the Arts and Humanities.

Speculation: Australia

Rufus Gifford

Finance director, Obama for America

A former film executive who switched to the world of electoral finance, Gifford was the fundraiser-in-chief for the Obama campaign’s record-breaking haul in 2012. He and his then-partner Jeremy Bernard were hired as consultants for the Obama campaign in 2008, and helped make California the top state for campaign dollars.

Speculation: Denmark

Colleen Bell

Producer and philanthropist

Bell is a producer on “The Bold and the Beautiful,” executive produced by her husband Bradley Bell, and the creation of soap opera family Bell-Phillip Prods. She was one of the top bundlers of Obama’s re-election campaign, and hosted the president for a campaign event at her family’s Holmby Hills home last year. She also serves as a trustee for the Kennedy Center and is heavily involved in the Natural Resources Defense Council, among other orgs.

Speculation: Unknown

Follow @Variety on Twitter for breaking news, reviews and more