Quote Originally Posted by Rich View Post
Believe that it's more about persuading people that don't typically vote to cast a vote in the campaigner's favour.
More than that. It is about the notion (not currently fashionable, I admit) that people should and can make up their own minds on the basis of discussion and debate, and that political decisions that affect people's lives can be made on this basis.

Party loyalty is always a big factor, but so are floating voters who consider each campaign on its own merits. Judging May in May, as it were.