A shake-up is underway at the Democratic National Committee as several key longtime officials have lost their posts, exposing a still-raw rift in the party and igniting anger among those in its progressive wing who see retaliation for their opposition to DNC Chairman Tom Perez…

Complaints began immediately after party officials saw a list of Perez’ appointments to DNC committees and his roster of 75 “at-large” members, who are chosen by the chair.

The removal and demotion of a handful of veteran operatives stood out, as did what critics charge is the over-representation of Clinton-backed members on the Rules and Bylaws Committee, which helps set the terms for the party’s presidential primary, though other Sanders and Ellison backers remain represented.