Historic Political Conventions — PICTURES

July 31, 2012, 6:53 a.m.

Every four years both parties hold a na­tion­al con­ven­tion, his­tor­ic­ally called to nom­in­ate a pres­id­en­tial and vice pres­id­en­tial can­did­ate. Since the mid-20th cen­tury, the parties have largely chosen their nom­in­ee be­fore the con­ven­tions, mak­ing them ce­re­mo­ni­al af­fairs staged for pub­li­city.