San Francisco voters should not be under the illusion that they are making more than a very modest incremental dent in the city’s affordable-housing crisis when they vote for Proposition A. Government could spend billions on new housing without curing the daunting gap between supply and demand.  Still, this $310 million affordable-housing bond is a step in the right direction, and voters should readily embrace it.

The first local measure on this November’s ballot will be Proposition A, the $310 million Affordable Housing Bond, a critical proposal to provide necessary funding for addressing the current housing crisis.

Weeks of political gamesmanship over the size of a proposed housing bond has resulted in a deal between the mayor and the Board of Supervisors’ progressive members, after a long night of negotiations that lasted until 12:30 a.m. Wednesday.