(The Center Square) - Colorado’s 3rd Congressional District primaries have been defined by changes in President Donald Trump's endorsement, a late challenger and environmental concerns.

The pair of June 30 contests feature two Republicans and two Democrats, as incumbent Rep. Jeff Hurd, R-Grand Junction, looks to hold onto his seat after an endorsement by Trump. That follows the Republican president's earlier criticism of Hurd and endorsement of a different candidate in the GOP primary. The winners of the two partisan races will face each other in the Nov. 3 general election. 

Originally published on thecentersquare.com, part of the BLOX Digital Content Exchange.