LANSING, Mich. (AP) — Organizers of a drive to repeal Michigan’s 50-year-old prevailing wage law report raising about $1 million for their petition drive.

The campaign says an organization tied to Amway’s founding DeVos family has contributed $360,000 since late May. MLive.com says the contribution from the Michigan Freedom Fund is the biggest contributor so far.

The group Protecting Michigan Taxpayers reported Monday that Associated Builders and Contractors gave $297,000, and the Construction Legal Rights Foundation gave $263,000.

The initiative seeks repeal of a law requiring workers on state-financed construction projects to get union-scale wages. If backers get about 252,000 signatures, the bill goes to the Republican-controlled state Legislature.

Republican Gov. Rick Snyder can’t veto the bill if lawmakers pass it. Otherwise, it goes on a statewide ballot in November 2016.