As part of its endorsement process, the San Francisco Chronicle editorial board is hosting a debate for San Francisco Supervisor District 3, featuring incumbent Julie Christensen, former Supervisor Aaron Peskin and Wilma Pang.

This race has been particularly hot, not only because of the absence of competitive races in all but one citywide post — sheriff — but for its impact on the balance of power on the board. Christensen is regarded as a moderate and ally of Mayor Ed Lee; Peskin is a progressive with a strong personality. The presence of Pang, who has run for various elective offices over the years, could be a wild card with ranked-choice voting.

The debate will be live-streamed on SFChronicle.com at 11 a.m. on Wednesday, Sept. 30.