My primary point is to allow the debate.  After Citizen's United equated purchased speech with free speech the party system based on a common "platform" is as meaningless as it ever has been because now  the party candidates are absolutely beholding to those who can purchase the necessary message with unlimited funds..  As to write-in candidates that process would have to be allowed in the General Election (and I suppose the Primary); however,  the chances of a write in defeating the two most popular primary candidates would be very slim. Like I said let the debate on this issue proceed.