Although not being elected yet, Rizzo essentially functioned as mayor before the election, as Mayor James Tate had announced on television that he was retiring and naming Rizzo "de facto" mayor of Philadelphia. Asked if this was legal, Tate only laughed and replied that he was retiring. Rizzo finally ran for mayor in 1971. That year, he faced Democratic mayoral candidates Rep. William J. Green, a former Democratic city chairman; State Rep. Hardy Williams; and former city councilman David Cohen. Cohen withdrew from the race and endorsed Green. Rizzo then defeated Green and Williams in the Democratic primary.
