Just because this guy says they are signed on doesn't mean it is so. I'll believe it when he submits ALL the name od these groups. They sure got organized quickly. I imagine Greenpeace is among them.
Follow the link above. The members include: the Rutherford Foundation, the Baptist Joint Committee on Public Affairs, the Competitive Enterprise Institute, the Ethics & Religious Liberty Commission of the Southern Baptist Convention, Gun Owners of America, the Libertarian Party, the Patrick Henry Center for Individual Liberty, and the Second Amendment Foundation, among others.
If you follow the link to the list, you will find they are not.