U.S. Sen. Cory Gardner, a Colorado Republican, on a tour of abandoned mines in Clear Creek County. (Jesse Paul, The Colorado Sun)

Cory Gardner: Five factors that will determine whether he can win in 2020

The Republican U.S. senator faces re-election on the same ballot as Donald Trump and Democrats are still holding a grudge from 2014

Politics and Government Primary category in which blog post is published
Sun Investigation Primary category in which blog post is published

Colorado’s 2015 law changing how officer-involved shootings are investigated still lets law enforcement police themselves

State lawmakers and prosecutors are vowing to push for and support changes after questions from The Colorado Sun about the measure