Can you see differences between their policies?
That's a very difficult question, in the sense that Senator McCain is a coauthor of climate change legislation. In a sense, his position on where this country needs to go is a little clearer than the others.
What's the timeline between now and Copenhagen?
The next big meeting is in Poland in December, and that will bring ministers together again to talk about the shared vision and long-term goal that needs to be driving this process. There are two smaller ones in between, when more work will be done and the agenda that was specified in Bangkok will be taken up and people will get into the substance of things. The first of those will be in Bonn in June and the second in Ghana in August.