Sen. Mark Udall (D) has a tough race on his hands in 2014. Rep. Cory Gardner (R) entered the race late and polls show this race to be a tossup. Both Udall and Gardner had wrapped up their nominations but yesterday's primary vote confirmed the nominees. BIPAC has endorsed Rep. Gardner in his Senatorial bid.
CO-4: With Rep. Cory Gardner (R) running for Senate, the 4th district is an open seat. This is a solidly Republican seat, so the determinative race was the GOP primary. Weld County District Attorney Ken Buck, the frontrunner, won with 44% of the vote. Buck was originally running for Senate, but dropped down to the 4th district once Gardner announced.
CO-5: Doug Lamborn, challenged by frequent foe and rival Bentley Rayburn, faced a much closer than expected vote count and escaped with a narrow 53-47 victory in the GOP primary.
CO-6: Rep. Mike Coffman (R) is being challenged by former House Speaker Andrew Romanoff (D). Neither had a primary challenge and both have been gearing up for the general election on November 4th. Coffman, a BIPAC endorsed candidate, is one of the most vulnerable House Republicans this cycle, and this is expected to be one of the most expensive House races in 2014.