In Colorado, only about 5% of its registered voters had a say in the presidential nominating process this year. Regardless of how you feel about the presumptive nominees, it’s hard to imagine a less inclusive system, and it prompts one to wonder, “How did Colorado get here?” According to the advocacy group Let Colorado Vote, it boils down to ineffective caucuses that are not serving the state’s population. This year, just 6% of registered Republicans showed up for caucuses after their party op...