Mayor's new school chancellor

New York City Mayor Bill de Blasio has announced Richard Carranza, the superintendent of schools in Houston, as his choice for schools chancellor. Carranza would replace Carmen Farina, who is retiring. De Blasio's first choice, Alberto Carvalho of Miami-Dade County, abruptly backed out of the job after being announced. Carranza has been the superintendent in Houston since August 2016. He previously was superintendent of the San Francisco school system.