Photo by Michael DeAngelis.

Michelle Rhee, the polarizing Chancellor of Washington D.C.’s public schools, will resign tomorrow morning, according to a report in the Washington Post. DCist has also confirmed the news with sources close to the situation. Rhee is expected to announce she’ll resign, effective at the end of October, during a press conference to be held in the East Room of the Mayflower hotel in downtown Washington at 10:30 a.m.

The Post reports that Deputy Chancellor Kaya Henderson will serve as interim Chancellor after Rhee leaves. The Atlantic’s Marc Ambinder tweets that Rhee “is headed to another major school district or into the Obama administration, which has promoted her work.”

In an exhaustive interview with DCist before the primary election, Rhee said that she was “fully committed” to being Chancellor, but carefully expressed reservations about her future under a Vince Gray administration. Rhee told WAMU in June that she hadn’t seen “a willingness to make some very tough decisions” from Gray during his tenure as D.C. Council Chairman.

Rhee had been toeing a somewhat-diplomatic line since the man who appointed her, Adrian Fenty, lost his bid for reelection in September to Vince Gray. Rhee appeared on Meet the Press (but didn’t say much about her plans) and she didn’t speak with the media after meeting with Gray late in September. Rhee did find herself digging out of a hole shortly after the election when she called the results of the vote “devastating.”

Gray, who will presumably carry his primary plurality to a victory in November’s general election and then take office in January, had actually been fairly mute regarding Rhee in the two town halls he held before this evening’s event in Ward 7.

DCist’s Martin Austermuhle is at tonight’s town hall, and he will have a full report of any remarks Vince Gray makes about Rhee’s resignation tomorrow morning.