Democratic socialists struck another blow against the Democratic establishment on Tuesday in Colorado, where CNN’s Decision Desk projects that 29-year-old Melat Kiros will defeat incumbent Rep. Diana DeGette, who was first elected before Kiros was born, in a primary.

Kiros was the third progressive challenger to defeat a sitting House member in eight days, after two more won last week in New York.

And, after successes in mayor’s races, congressional primaries and more on both coasts, Kiros’ win showed the expanding geographical reach of the left-wing insurgency seeking to remake the Democratic Party ahead of this year’s midterm elections — and as the 2028 presidential primary looms increasingly large.

[The] voters opted to keep their two Democratic senators in the Senate. That was good news for Sen. John Hickenlooper, who fended off a challenge from the left. But it was bad news for Sen. Michael Bennet, who lost the party’s primary for governor to state attorney general Phil Weiser.

Weiser campaigned on confronting President Donald Trump more aggressively than Polis, who was recently rebuked by his own party for deciding to grant clemency to election denier Tina Peters.