Apparently the Democrats are maneuvering to avoid campaign finance laws.
This information on their "secret slush fund" comes from the Detroit Free Press:
"Meanwhile, the Democratic Governors Association has poured $750,000 into Partners for Progress, a fund run by the Kalamazoo County Democratic Party that is expected to help Granholm's campaign.
The fund is not required by law to reveal its donors or how it spends money. Republicans complain that Partners for Progress amounts to a large, secret slush fund for Granholm."