With the media attention on the big names in the election, how do you expect to win the nomination? Roland Green, DENVER
I have to do well enough in the first primary states to command the media attention that I would otherwise have to buy. That's why we in the second tier are all fearful of these compressed primaries. We can't afford to run in 10 states at one time.
What evidence would convince you that global warming is a serious threat to the planet? Jeff Young, SYDNEY, AUSTRALIA
I have no doubt...