 Allen was endorsed by the editorial board of The Washington Post, Service Employees International Union, D.C. for Democracy, D.C. Chamber of Commerce PAC, the D.C. Chapter of the National Organization for Women, the D.C. Association of Realtors, Clean Slate Now,
the local firefighters' union, and the local police officers' union.The local American Federation of State, County and Municipal Employees endorsed Thompson.Allen and his treasurer Patrick Johnson opted for a campaign finance model that did not accept corporate donations.