There are a lot of articles about this on the Net.
Here is one:
Bush family hedges its bets for 2008
By Alexander Bolton
March 26, 2007
Much of Jeb’s inner circle has picked Romney. The list includes Sally Bradshaw, who served as Gov. Bush’s campaign manager in 1994 and 1998 and as his first gubernatorial chief of staff; Ann Herberger, who was the governor’s campaign finance director; and Mandy Fletcher, who recently headed Bush’s think tank, Foundation for Florida’s Future, and worked on his reelection. In addition, Alan Philp, Bush’s former policy director, is coordinating policy and issues for Romney.
Jeb Bush’s former lieutenant governor Toni Jennings, Al Cardenas, who served as Florida GOP chairman under Jeb, David Griffin, who headed Jeb’s second -term transition office and was the Florida Lottery Secretary, Sherri McVay, executive director of Jeb’s statewide advocacy council, and Kristy Campbell, the former governor’s press secretary, are all playing roles in Romney’s campaign.
http://thehill.com/leading-the-news/bush-family--hedges-bets-2007-03-26.htmlWhy? I will leave that to the readers to speculate upon.