Today Barack Obama pleaded to voters, "Make me your second choice, although you are wiser making me your first." He brought up an interesting subject. Caucuses run by slightly different rules, but it's a good thing to think about. Many people become frustrated with having to throw all their support behind one candidate who may not win.
This is why I like Obama as a politician. He's good at appealing to people who otherwise feel disillusioned with the political system. Instant runoff voting makes a lot of sense for America's democratic system, since we've become so limited with a two-party system. With instant runoff voting, people can feel good about the candidate they really like without feeling like they threw their vote away. Ultimately, this might help third party candidates break into state legislatures or even Congress (Bernie Sanders is quite the exception to make it to the Senate in an overwhelmingly two-party system).