There could be markets for individual state primaries, and the eventual nominee for each party.
Some states have combinations of primaries and caucuses that would require precision in the event description to run smoothly.
Absolutely - would love to compare than the forecasts to: http://fivethirtyeight.com/politic
I am also really looking forward to conditional markets: what it is likelihood of democrats win under the condition that B. Sanders runs for example.