The linked article is very important to read if you are a political type. I suspect that this will be the first of many on this subject.
The Democratic Party is beginning to make noises about changing its primary system. Ostensibly, they are concerned about the fact the larger states are being unfairly deprived of their true strength by virtue of their later primaries. States like Michigan are loudly griping that the nomination has usually been decided before their primary is conducted.
The real reason behind these moves is the fact that only the most radical left-wing members of the party get emotionally engaged in the process early on, with the more sedate types tending to wait until later. This is forcing candidates to take radical positions in the early primaries which make them less viable in the general election.
If they bunch the primaries, with very large states being heard from right alongside the small ones, the condensed process will allow for more of a centrist voter base.