While apprehensions at the U.S.-Mexico Border are at historic lows, immigration has become a top issue for Republican voters.
A veteran, Sias served in combat as a pilot and ground controller during Desert Storm and the Second Iraq War.
There were no surprises among the handful of competitive primaries in Colorado’s congressional districts.
Election results for primary night 2018.
Cynthia Coffman says Stapleton missed an April 2 party deadline to declare he would seek to qualify for the June primary at Saturday's assembly.
Claims were made that seven circulators who collected signatures for Lamborn were not Colorado residents.
The decision shakes up an already-fierce contest for the GOP nomination for governor.
Republicans said it would be a "dereliction of duty" to punt the appointment to the governor.
If safe lawmakers shoot down politically perilous bills, then vulnerable lawmakers can dodge a tough vote.
"Cities like Denver and states like California are allowing criminal aliens to run loose, to kill, murder, maim or hurt our fellow Americans, " said State Rep. Dave Williams.