Excitement is building ahead of Colorado's caucuses March 1, at least among the voters who can participate. More than a third of registered voters in the state are excluded because they're unaffiliated. We talk to a political scientist who wants to change that. We'll also hear about a potential ballot measure that would create a hybrid here -- of caucuses and a primary. Then, we talk to a Colorado filmmaker who moved to the U.S. from Iraq and who contemplates what it is to be "Arab-American."