IRV

One thing I would like to see when democrats pick a presidential candidate is the use of Instant Runoff Voting.

This is a voting technique that works better to represent the will of the electorate than our current techniques. Also, experience in San Francisco indicates that when candidates must appeal to the broadest number of voters they become less polarizing:

Details here

Since IRV is scientifically proven to choose the candidate with the most appeal among primary voters, then why wouldn't democratic advisors rush to embrace it?

Another virtue of IRV is that you can vote your conscience without worrying about casting your vote for a spoiler. A vote for Nader, in other words, does not become a vote for Bush. A vote for Ross Perot, to cite another example, does not become a vote for Bill Clinton.

Can anyone think of a reason not to use IRV in the primary process?