Julie Gonzales, a Colorado state senator and former labor organizer, challenged incumbent U.S. Senator John Hickenlooper in the state’s Democratic primary on June 30, 2026, in a race that reflected a broader progressive wave reshaping the party’s direction.
Hickenlooper, 74, a former Denver mayor and Colorado governor first elected to the Senate in 2020, faced an unexpectedly competitive primary battle despite significant financial advantages. According to Reuters, Hickenlooper raised nearly $10 million for his campaign compared with Gonzales’ $870,000, yet recent polling showed the gap narrowing. A poll released by Colorado Community Research in June found Hickenlooper leading by 7 percentage points, with a quarter of voters still undecided—a dramatic shift from a February survey by the Working Families Party PAC that showed him with a 32-point lead.
Gonzales, 43, built her challenge on a progressive platform that included an arms embargo on Israel and efforts to rein in Immigration and Customs Enforcement, positioning herself as an alternative to what she characterized as Hickenlooper’s more centrist approach. The state senator has received endorsements from labor unions and progressive organizations despite her fundraising disadvantage.
Colorado’s primary reflected a national pattern of Democratic voters seeking to disrupt the party establishment with younger, more ideologically progressive candidates. After prominent upsets in Maine and New York earlier in 2026—where progressive challengers ousted or defeated incumbent Democrats—Colorado’s races became a key test of whether the leftward momentum would extend to Senate races. Reuters reported that Democratic voters across these states were seeking candidates who reject corporate PAC money, stake out tougher positions on Israel, and present themselves as fighters for the working class.
Hickenlooper’s narrowing lead and Gonzales’ competitive fundraising from grassroots and union sources signaled that even well-established incumbents with substantial resources faced pressure from the party’s progressive wing. The race underscored broader tensions within the Democratic Party over its direction and which generation of leaders would shape its future.
Sources
- Reuters — Hickenlooper’s fundraising totals, Gonzales’ platform positions, polling data showing Hickenlooper’s lead narrowing from 32 points to 7 points, and context on the broader progressive wave in Democratic primaries
- Colorado Newsline — Hickenlooper’s background as former Denver mayor and Colorado governor, his 2020 Senate election
- The Colorado Sun — Gonzales’ background as state senator and former labor organizer, detailed candidate issue positions
