Most of the money being spent on ads in Michigan's campaign for Governor and U.S. Senate comes from outside groups.
A news release from the Michigan Campaign Finance Network says that of the $12.8-million spent on television advertising through the Memorial Day weekend, only $2.9-million has been spent by the candidate campaigns. The rest of the advertising money is being spent by independent groups who have run ads critical of the candidates.
The Michigan Campaign Finance Network says donors to those groups are largely unknown. The network's executive director Rich Robinson says the political environment has been created by the Supreme Court's rulings on campaign finance laws.