Colorado’s primaries present the next test for the Democratic establishment

Veteran Colorado Democrats running for Senate, governor and House are facing another round of insurgent challengers Tuesday.

Tuesday’s primaries in Colorado mark the next front in the establishment-versus-insurgent battle playing out within the Democratic Party, one week after major victories for candidates in New York City backed by Mayor Zohran Mamdani.

Limited time: Save 25% on NBC News subscription

Get exclusive reporting, live Q&As and ad-free reading.

Colorado’s Democratic primaries have flown more under the radar, but they feature three major contests where veteran Democrats are facing challengers who are aiming to capitalize on the party’s growing anti-Washington sentiment.

Here’s what to watch for Tuesday night as the votes come in. Polls close at 9 p.m. ET.