Now this might be me not knowing enough about US politics again, but here goes a few questions about the Dem primary:
Dean seem to be polling at roughly 30% in the Dem primary. There is proportional allocation in most states. Shoudn't this make it hard for the man to capture an absolute majority of the delegates? Secondly, what happens to the delegates for candidates who later drop out? Do they switch their alignment or what?
True, but when candidates drop out then can release delegates to another candidate, usually for a price to be discussed behind closed doors. Furthermore, there are about 500 some "super-delegates" that can vote in the Democratic Convention. They are mostly made up of Democratic office holders and members of the DNC. They have an incentive to create a united party at the convention and will swing behind Dean if he has the largest block of delegates. So even if a particular frontrunner polls "only' 30% in the polls it could very well be that he is on his way to victory and an easy majority at the convention.