The primary system we use to choose candidates in the United States is broken, but there's a proven way to make it better.
A tiny fraction of possible voters get to choose who is actually running for office. It's what happens in most state and federal elections across the country; if you're a registered Republican, you get to vote in the primaries for that party. Democrat? Same.
But what if you're among the more than 40% of voters (and half of all millennials) who are independent?
In many states, you have to actually register as a member of a party in order to vote in the primary.