Colorado will vote on Tuesday to pick a Democrat to take on GOP Sen. Cory Gardner, a choice that will define one of the party’s best opportunities to defeat an incumbent Republican on its quest to take back the Senate.
Former two-term Gov. John Hickenlooper, who ran a short-lived campaign for the 2020 Democratic presidential nomination, is the national party’s pick to take on Gardner, one of two Republicans facing reelection in a state Hillary Clinton carried in 2016.
But Hickenlooper, long seen as the Democratic frontrunner, faces competition from former state House speaker Andrew Romanoff, whose challenge from the left gained momentum after Hickenlooper suffered from a series of negative headlines in June.
Romanoff is no stranger to campaigns. He unsuccessfully challenged newly appointed Sen. Michael Bennet in a 2010 Democratic primary. Four years later, he lost a bid for a Denver-area…