In part four of our four-part series on Baltimore’s political history with Matthew A. Crenson, we hear about the factions and prejudices that influenced municipal elections and public policy in the 20th Century. Crenson talks about the post-World War II mayoralties of Thomas J. D’Alesandro Jr., a master politician; that of his son, Thomas D’Alesandro III, who was mayor during the riots of 1968; and those of William Donald Schaefer and Kurt L. Schmoke. Matt Crenson is professor emeritus of political science at Johns Hopkins University. His book from Johns Hopkins University Press is “Baltimore: A Political History.” Its official release is set for August 8 at the Baltimore City Archives. He will also appear at the Ivy Bookshop in September.Links: https://www.amazon.com/Baltimore-Political-History-Matthew-Crenson/dp/1421422069https://www.facebook.com/events/696332980558435/https://baltimorecityhistory.net/http://www.theivybookshop.com/