San Francisco Board of Supervisors President David Chiu is scheduled to announce he will run for mayor on Monday morning.

The District 3 supervisor will kick off his campaign for The City’s top post on the steps of City Hall at 11 a.m., according to a source in his camp.

Chiu, whose district includes North Beach and Chinatown, was elected in 2008 with the blessing of progressive predecessor Aaron Peskin.

He found himself voted in as board president over veteran colleagues, including Supervisor Ross Mirkarimi. Then, Chiu began distancing himself from far-left progressive politics.

In January, Chiu withdrew his withdrew his name for possible appointment by Mayor Gavin Newsom as San Francisco’s District Attorney.

maldax@sfexaminer.com