By KELLEN BROWNING The insurgent progressive movement jolting the Democratic Party rolled through Colorado on Tuesday evening in the latest test of the left’s ability to oust establishment politicians and usher in generational change. In two primary battles between mainstream figures and candidates running to their left as Washington outsiders, the more liberal candidates prevailed. Melat Kiros, a 29-year-old lawyer and democratic socialist, toppled a veteran congresswoman in Denver, while…
