I have a question for Scott Walker. At what point did he decide to be heterosexual? At what age did he decide that he would not be homosexual or, if he had the energy, bisexual? I know for myself that I am unaware of making such a decision and did not mark it down — as I now would — in my Google Calendar or tweet it to much of America and the ships at sea.

I ask these questions of Walker as a way to clarify his befogged mind. The man is running for president of the United States. He is governor of the state of Wisconsin. He is a husband and a father and a former Boy Scout, and yet he cannot say — or he will not say — whether he thinks being gay is a choice.

“I don’t have an opinion on every single issue out there,” the Republican candidate told CNN while campaigning recently in Iowa for the nation’s loftiest office. “I mean, to me, that’s I don’t know. I don’t know the answer to that question.” I see.

Much has already been made of things that Walker does not know — foreign policy, for instance, or evolution, about which he offered no opinion when asked about it in London back in February. He just wouldn’t say yes or no, maintaining that he was in England on a trade mission and not to discuss evolution. He implied that Wisconsin taxpayers would not like it if, while on an overseas trip to hustle cheese and stuff, he responded to a non-cheese question. You can see his point.