Bay Area political events: diplomacy, impeachment Political events in the Bay Area Diplomacy talk: A panel with foreign affairs experts, “U.S., Iran, Saudi Arabia: A New Diplomatic Calculus?” The discussion is from 6:30 to 7:45 p.m. at the World Affairs Auditorium, 312 Sutter St., Suite 200 in San Francisco. Nationwide marches will call for President Trump’s impeachment. Laborfest: A month-long cultural, arts and film festival celebrating the history and culture of working people gets under way with a labor-history bike tour starting at noon at 518 Valencia St.