Kelvin J. Robinson is withdrawing from the race for the vacant at-large seat on the D.C. Council and throwing his support behind former council member Vincent Orange, he announced Monday night.
Robinson, who had been chief of staff to D.C. Mayor Anthony A. Williams, made the announcement on Twitter during a candidates forum in Ward 6.
Williams decision comes amid a flurry of last-minute endorsements heading into Thursday's endorsement vote by the 80-member D.C. Democratic State Committee.
Earlier today, D.C. Council Chairman Kwame Brown (D) and Lorraine Green, one of Mayor Vincent C. Gray's closet advisors, announced they are supporting Orange's chief rival, school board member Sekou Biddle.
Robinson, who unsuccessfully ran against Council member Tommy Wells (D-Ward 6) last year, was widely viewed as a credible candidate for the the state committee endorsement.
But many observers now believe its a two person race between Orange and Biddle.
The winner of the D.C. Democratic Committee's endorsement vote will assume office immediately pending a special election in the spring, in which any registered voter can participate.