Feminists: how do you explain this phenomena from an extremist position?

What you need to do is spread the word amongst the people in his seat and ask if they think it is fair and reasonable? If they think he is an extremist or an opportunist willing to sacrifice the welfare of the constituency in exchange for some gain to him. Oprah might decide she would endorse a certain candidate if she got a say in what he did later. Deals are done. She might accept a free seat at a fundraiser? The people must be informed and they have the absolute right to question his ethics. Why would he support it if it is not good for his constituents? He must have his reasons. Find out what they are.