There are philosophical issues involved in that about choosing the right discount rate, the value, the future, and things like that which drive it. But its start with the premise that global warming is real and if you're a denier of that fact, then you're not going to find climate change mitigation policies to have particular appeal.
But it was very hard for people to separate me out from Hillary Clinton. All their ads were Hillary Clinton, John Kerry, John Edwards, and me. They said I was more liberal than these guys, and that if I went to Washington I'd be supporting their agenda. I found that extremely difficult to overcome.